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Source: https://wpcrux.com/blog/how-to-handle-null-values-in-mysql

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</span></span></div></div></div></div></div></div> <div class="col-md-9 col-lg-9 col-12">   <div itemprop="blogPost" itemscope="itemscope" itemtype="https://schema.org/BlogPosting" class="v-card v-sheet theme--light"><div class="v-card__title"><div class="row"><meta itemprop="author"> <meta itemprop="mainEntityOfPage" content="https://wpcrux.com/blog/how-to-handle-null-values-in-mysql"> <div itemprop="publisher" itemscope="itemscope" itemtype="https://schema.org/Organization" class="d-none"><meta itemprop="name" content="wpcrux.com"> <div itemprop="logo" itemscope="itemscope" itemtype="https://schema.org/ImageObject"><meta itemprop="url" content="https://blogweb-static.fra1.cdn.digitaloceanspaces.com/images/169cba5e-b8ab-45bd-a57d-4efbb973a779/logo/99cc33.png"></div></div> <div class="col-md-12 col-lg-9 col-12"><h1 itemprop="name headline" class="font-weight-bold">
How to Handle NULL Values In MySQL?
</h1></div> <div class="d-flex justify-end align-start col-md-12 col-lg-3 col-12"><div><span class="d-flex caption"><i aria-hidden="true" class="v-icon notranslate mdi mdi-clock-outline theme--light"></i> <time datetime="2024-07-01T22:52:58Z">
July 1, 2024 10:52 PM</time> <meta content="2023-12-01T03:40:30Z" itemprop="datePublished"> <meta content="2024-07-01T22:52:58Z" itemprop="dateModified"></span> <span class="d-flex caption justify-end">
14 minutes read
</span></div></div></div></div> <div class="col col-12"></div> <div class="v-card__text post-text ql-viewer"><div class="row"><div itemprop="image" itemscope="itemscope" class="text-center col col-12"><div aria-label="How to Handle NULL Values In MySQL?" role="img" itemprop="url contentUrl" itemtype="https://schema.org/ImageObject" class="v-image v-responsive theme--light" style="max-height:300px;"><div class="v-image__image v-image__image--preload v-image__image--contain" style="background-image:;background-position:center center;"></div><div class="v-responsive__content"></div></div></div></div> <div itemprop="articleBody" class="row"><div class="col"><div class="run-code"><p>NULL values in MySQL refer to the absence of a value in a field. They can occur when you insert or <a href="https://wpcrux.com/blog/how-to-update-records-in-a-mysql-table">update</a> a record without specifying a value for that field, or when a certain field does not have any meaningful data to be stored.</p><p><br/></p><p>To handle NULL values in MySQL, you can:</p><ol><li><strong>Check for NULL values using the IS NULL operator</strong>:
SELECT * FROM table_name WHERE <a href="https://wpcrux.com/blog/how-to-get-the-not-null-column-name-in-a-mysql">column_name IS NULL</a>;
This query will return all records where the specified column has a NULL value.
</li><li><strong>Check for non-NULL values using the IS NOT NULL operator</strong>:
SELECT * FROM table_name WHERE column_name IS NOT NULL;
This query will return all records where the specified column does not have a NULL value.
</li><li><strong>Handle NULL values in calculations or expressions using the IFNULL() function</strong>:
SELECT column_name, IFNULL(column_name, 'default_value') FROM table_name;
The IFNULL() function allows you to specify a default value that will be used in case the column contains a NULL value.
</li><li><strong>Assign a default value to a column when creating a table</strong>:
CREATE TABLE table_name (
column_name data_type DEFAULT default_value
);
By providing a default value when creating a table, you ensure that the column will always have a value, even if it is not explicitly defined during insertion.
</li><li><strong>Use the COALESCE() function to handle NULL values and select the first non-NULL value from a list of expressions</strong>:
SELECT column_name, COALESCE(column1, column2, 'default_value') FROM table_name;
The COALESCE() function returns the first non-NULL value from the list of expressions. If all expressions are NULL, it will return the specified default value.
</li></ol><p><br/></p><p>By understanding how NULL values work in MySQL and utilizing these techniques, you can effectively handle and manage NULL values in your database operations.</p>
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<p><br/></p><h2>How to check if a value is NULL in MySQL?</h2><p>In MySQL, you can use the IS NULL operator to check if a value is NULL. Here is an example query:</p><p><br/></p><p>SELECT * FROM table_name WHERE column_name IS NULL;</p><p><br/></p><script async="" src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>

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</script><p>Replace "table_name" with the name of your table, and "column_name" with the name of the column you want to check for NULL values. The query will return all rows in which the specified column has a NULL value.</p><p><br/></p><h2>What is the default behavior of NULL values in MySQL?</h2><p>The default behavior of NULL values in MySQL is to treat them as unknown or missing values. NULL is not the same as an empty string or zero; it represents the absence of a value. When performing calculations or comparisons involving NULL, the result will also be NULL. However, some functions and operators in MySQL may treat NULL values differently.</p><p><br/></p><h2>How to handle NULL values in case statements in MySQL?</h2><p>In MySQL, you can handle NULL values in case statements using the COALESCE() function or by explicitly checking for NULL values.</p><ol><li><strong>Using COALESCE()</strong>:
The COALESCE() function allows you to return the first non-null value from a list. You can use it in a <a href="https://elvanco.com/blog/how-to-use-case-when-in-another-case-when-condition" target="_blank">case statement</a> to handle NULL values. Here's an example:
SELECT col1, col2, COALESCE(col3, 'N/A') AS col3
FROM your_table;
In the above example, if col3 is NULL, it will be replaced with 'N/A' in the result set.
</li><li><strong>Explicitly checking for NULL</strong>:
If you want to perform specific operations or have different outputs for NULL values, you can explicitly check for NULL. Here's an example:
SELECT col1,
CASE
WHEN col2 IS NULL THEN 'No value'
ELSE col2
END AS col2
FROM your_table;
In the above example, if col2 is NULL, it will be replaced with 'No value' in the result set.
</li></ol><p><br/></p><p>Both methods allow you to handle NULL values in case statements in MySQL. Choose the one that best fits your requirements.</p>
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<p><br/></p><h2>How to handle NULL values when using the IN operator in MySQL?</h2><p>When using the IN operator in MySQL, you need to be aware of how it handles NULL values. Here are a few ways to handle NULL values when using the IN operator:</p><ol><li><strong>Exclude NULL values</strong>: If you want to exclude NULL values from your result set, you can use the IS NOT NULL condition before the IN operator. For example:
SELECT * FROM table WHERE column IS NOT NULL AND column IN (value1, value2, value3);
</li><li><strong>Include NULL values</strong>: If you want to include NULL values in your result set, you can explicitly include NULL in the list of values used in the IN operator. For example:
SELECT * FROM table WHERE column IN (value1, value2, value3, NULL);
</li><li><strong>Use IS NULL condition</strong>: If you want to specifically check for NULL values in a column without using the IN operator, you can use the IS NULL condition. For example:
SELECT * FROM table WHERE column IS NULL;
</li></ol><p><br/></p><script async="" src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>

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</script><p>It's important to note that the behavior of the IN operator with NULL values may vary depending on the version of MySQL you are using. Therefore, it's recommended to test and validate the results when dealing with NULL values and the IN operator.</p><p><br/></p><h2>How to update NULL values in MySQL?</h2><p>To update NULL values in MySQL, you can use the UPDATE statement along with the IS NULL condition.</p><p><br/></p><p>Here is an example:</p><div style="color:#f8f8f2;background-color:#272822;">
<table style="border-spacing:0;padding:0;margin:0;border:0;"><tbody><tr><td style="vertical-align:top;padding:0;margin:0;border:0;">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1
</span><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2
</span><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3
</span></pre></td>
<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="display:flex;"><span>UPDATE your_table
</span></span><span style="display:flex;"><span>SET column_name = new_value
</span></span><span style="display:flex;"><span>WHERE column_name IS NULL;
</span></span></pre></td></tr></tbody></table>
</div>
<p><br/></p><p>In the above query, <code>your_table</code> is the name of the table you want to update, <code>column_name</code> is the name of the specific column that contains the NULL values, and <code>new_value</code> is the value you want to update the NULL values with.</p><p><br/></p><p>Make sure to replace <code>your_table</code>, <code>column_name</code>, and <code>new_value</code> with the appropriate values specific to your database.</p><p><br/></p><script async="" src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>

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<script>
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</script><h2>How to handle NULL values while performing joins in MySQL?</h2><p>When performing joins in MySQL, there are a few ways to handle NULL values:</p><ol><li><strong>INNER JOIN</strong>: By default, the INNER JOIN only returns rows where there is a match in both tables. Therefore, NULL values are automatically excluded from the result set. No additional handling is required.
</li><li><strong>LEFT JOIN or RIGHT JOIN</strong>: These join types return all the rows from one table (left or right) and the matching rows from the other table. If there is no match, NULL values are used for the columns of the other table. To handle NULL values in these types of joins, you can use functions like ISNULL(), COALESCE(), or IFNULL() to replace the NULL values with a specific value or perform some other calculation.
</li></ol><p><br/></p><p>Example:</p><div style="color:#f8f8f2;background-color:#272822;">
<table style="border-spacing:0;padding:0;margin:0;border:0;"><tbody><tr><td style="vertical-align:top;padding:0;margin:0;border:0;">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1
</span><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2
</span><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3
</span></pre></td>
<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="display:flex;"><span>SELECT t1.column1, t2.column2
</span></span><span style="display:flex;"><span>FROM table1 t1
</span></span><span style="display:flex;"><span>LEFT JOIN table2 t2 ON t1.id = t2.id
</span></span></pre></td></tr></tbody></table>
</div>
<p><br/></p><p>In this example, if there is no match in table2 for a row in table1, t2.column2 will be NULL. You can handle this using the COALESCE() function to display a different value instead of NULL:</p><div style="color:#f8f8f2;background-color:#272822;">
<table style="border-spacing:0;padding:0;margin:0;border:0;"><tbody><tr><td style="vertical-align:top;padding:0;margin:0;border:0;">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">1
</span><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">2
</span><span style="white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f">3
</span></pre></td>
<td style="vertical-align:top;padding:0;margin:0;border:0;;width:100%">
<pre tabindex="0" style="color:#f8f8f2;background-color:#272822;"><span style="display:flex;"><span>SELECT t1.column1, COALESCE(t2.column2, 'N/A') AS column2
</span></span><span style="display:flex;"><span>FROM table1 t1
</span></span><span style="display:flex;"><span>LEFT JOIN table2 t2 ON t1.id = t2.id
</span></span></pre></td></tr></tbody></table>
</div>
<p><br/></p><p>Here, if t2.column2 is NULL, 'N/A' will be displayed instead.</p><ol><li><strong>CROSS JOIN</strong>: CROSS JOIN is used to produce Cartesian products, resulting in every combination of rows from both tables. Since NULL is not excluded in any way, no special handling is needed.</li></ol><p><br/></p><p>It's important to note that handling NULL values in joins depends on your specific requirements and the context of your data. Be cautious when using functions like ISNULL(), COALESCE(), or IFNULL() as they can impact the performance of your query.</p><p><br/></p><script async="" src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js"></script>

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</script><h2>What is the impact of NULL values on the UNION operator in MySQL?</h2><p>The UNION operator in MySQL combines the result sets of two or more SELECT statements into a single result set. When handling NULL values, the impact on the UNION operator is as follows:</p><ol><li><strong>Rows with NULL values in the first SELECT statement</strong>: If a row in the first SELECT statement contains NULL values in the corresponding columns of the second SELECT statement, those rows will be included in the merged result set. However, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, they will not be included in the merged result set.
</li><li><strong>Rows with NULL values in the second SELECT statement</strong>: If a row in the second SELECT statement contains NULL values in the corresponding columns of the first SELECT statement, those rows will be included in the merged result set. However, if a row in the second SELECT statement has NULL values in the corresponding columns of the first SELECT statement, they will not be included in the merged result set.
</li><li><strong>UNION ALL and NULL values</strong>: If the UNION operator is modified with UNION ALL, which retains duplicate rows, NULL values will be considered as distinct values. Therefore, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, and the second SELECT statement also contains rows with NULL values in those columns, both the rows will be included in the merged result set.
</li></ol><p><br/></p><p>In summary, when using the UNION operator, NULL values can impact whether certain rows are included in the merged result set depending on how they are matched between the SELECT statements, and their treatment may vary based on whether UNION or UNION ALL is used.</p></div></div></div></div>  <div class="text-center col"></div> <div class="justify-center icons d-flex col col-12" data-v-80f69840 data-v-80f69840><a href="https://www.facebook.com/sharer.php?src=sp&u=https%3A%2F%2Fwpcrux.com%2Fblog%2Fhow-to-handle-null-values-in-mysql&quote=How%20to%20Handle%20NULL%20Values%20In%20MySQL%3F&hashtag=%23blogweb" rel="nofollow noopener" target="_blank" title="Facebook" data-v-80f69840><img src="https://blogweb-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/fb.png" width="32" height="32" alt="Facebook" data-v-80f69840></a>   <a href="https://twitter.com/intent/tweet?url=https%3A%2F%2Fwpcrux.com%2Fblog%2Fhow-to-handle-null-values-in-mysql&text=How%20to%20Handle%20NULL%20Values%20In%20MySQL%3F&hashtags=blogweb" rel="nofollow noopener" target="_blank" title="Twitter" data-v-80f69840><img src="https://blogweb-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/twitter.png" width="32" height="32" alt="Twitter" data-v-80f69840></a> <a href="https://www.linkedin.com/sharing/share-offsite/?url=https%3A%2F%2Fwpcrux.com%2Fblog%2Fhow-to-handle-null-values-in-mysql" rel="nofollow noopener" target="_blank" title="LinkedIn" data-v-80f69840><img src="https://blogweb-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/linkedin.png" width="32" height="32" alt="LinkedIn" data-v-80f69840></a> <a href="https://telegram.me/share/url?url=https%3A%2F%2Fwpcrux.com%2Fblog%2Fhow-to-handle-null-values-in-mysql" rel="nofollow noopener" target="_blank" title="Telegram" data-v-80f69840><img src="https://blogweb-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/telegram.png" width="32" height="32" alt="Telegram" data-v-80f69840></a> <a href="https://api.whatsapp.com/send?text=https%3A%2F%2Fwpcrux.com%2Fblog%2Fhow-to-handle-null-values-in-mysql" rel="nofollow noopener" target="_blank" title="Whatsapp" data-v-80f69840><img src="https://blogweb-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/whatsapp.png" width="32" height="32" alt="Whatsapp" data-v-80f69840></a> <a href="https://getpocket.com/save?url=https%3A%2F%2Fwpcrux.com%2Fblog%2Fhow-to-handle-null-values-in-mysql" rel="nofollow noopener" target="_blank" title="Pocket" data-v-80f69840><img src="https://blogweb-static.fra1.cdn.digitaloceanspaces.com/assets/images/icons/32/pocket.png" width="32" height="32" alt="Pocket" data-v-80f69840></a></div></div>   <div class="row mt-2"><div class="col col-12"><h2 class="display-1">Related Posts:</h2></div> <div class="col-sm-12 col-md-6 col-lg-4 col-12"><div class="mx-auto v-card v-sheet theme--light" style="max-width:400px;"><div class="v-image v-responsive align-end theme--light" style="height:200px;"><div class="v-image__image v-image__image--preload v-image__image--cover" style="background-image:;background-position:center center;"></div><div class="v-responsive__content"></div></div> <div class="v-card__title"><a href="/blog/how-to-handle-null-values-in-mysql-1" itemprop="mainEntityOfPage url">
How to Handle NULL Values In MySQL?
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NULL values in MySQL represent the absence of data or an unknown value. Handling NULL values requires special consideration as they differ from regular values. Here are some strategies for handling NULL values in MySQL:Identification: To check for NULL values ...
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Other companies' use of their tracking technologies is subject to their own privacy policies.\u003C\u002Fp\u003E\u003Cul\u003E\u003Cli\u003E\u003Cstrong\u003EUsing Your Personal Data\u003C\u002Fstrong\u003E\u003C\u002Fli\u003E\u003C\u002Ful\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003EWe may use your personal data as follows:\u003C\u002Fp\u003E\u003Cul\u003E\u003Cli\u003Eto operate, maintain, and improve our website, products, and services;\u003C\u002Fli\u003E\u003Cli\u003Eto manage your account, including to communicate with you regarding your account, if you have an account on our website;\u003C\u002Fli\u003E\u003Cli\u003Eto operate and administer our rewards program and other promotions you participate in on our website;\u003C\u002Fli\u003E\u003Cli\u003Eto respond to your comments and questions and to provide customer service;\u003C\u002Fli\u003E\u003Cli\u003Eto send information including technical notices, updates, security alerts, and support and administrative messages;\u003C\u002Fli\u003E\u003Cli\u003Ewith your consent, to send you marketing e-mails about upcoming promotions, and other news, including information about products and services offered by us and our affiliates. You may opt-out of receiving such information at any time: such marketing emails tell you how to “opt-out.” Please note, even if you opt out of receiving marketing emails, we may still send you non-marketing emails. Non-marketing emails include emails about your account with us (if you have one) and our business dealings with you;\u003C\u002Fli\u003E\u003Cli\u003Eto process payments you make via our website;\u003C\u002Fli\u003E\u003Cli\u003Eas we believe necessary or appropriate (a) to comply with applicable laws; (b) to comply with lawful requests and legal process, including to respond to requests from public and government authorities; (c) to enforce our Policy; and (d) to protect our rights, privacy, safety or property, and\u002For that of you or others;\u003C\u002Fli\u003E\u003Cli\u003Efor analysis and study services; and\u003C\u002Fli\u003E\u003Cli\u003Eas described in the “Sharing of your Personal Data” section below.\u003C\u002Fli\u003E\u003C\u002Ful\u003E\u003Cp\u003E\u003Cstrong\u003ESharing Your Personal Data\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EWe may share your personal data as follows:\u003C\u002Fp\u003E\u003Cul\u003E\u003Cli\u003E\u003Cstrong\u003EThird Parties Designated by You.\u003C\u002Fstrong\u003E We may share your personal data with third parties where you have provided your consent to do so.\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EOur\u003C\u002Fstrong\u003E \u003Cstrong\u003EThird Party Service Providers\u003C\u002Fstrong\u003E. We may share your personal data with our third party service providers who provide services such as data analysis, payment processing, information technology and related infrastructure provision, customer service, email delivery, auditing and other similar services.\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EThird Party Sites\u003C\u002Fstrong\u003E\u003C\u002Fli\u003E\u003C\u002Ful\u003E\u003Cp\u003EOur website may contain links to third party websites and features.\u003Cstrong\u003E \u003C\u002Fstrong\u003EThis Policy does not cover the privacy practices of such third parties.\u003Cstrong\u003E \u003C\u002Fstrong\u003EThese third parties have their own privacy policies and we do not accept any responsibility or liability for their websites, features or policies. Please read their privacy policies before you submit any data to them.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EUser Generated Content\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou may share personal data with us when you submit user generated content to our website, including via our rewards program, forums, message boards and blogs on our website. Please note that any information you post or disclose on our website will become public information, and will be available to other users of our website and to the general public. We urge you to be very careful when deciding to disclose your personal data, or any other information, on our website. Such personal data and other information will not be private or confidential once it is published on our website.\u003C\u002Fp\u003E\u003Cp\u003EIf you provide feedback to us, we may use and disclose such feedback on our website, provided we do not associate such feedback with your personal data. If you have provided your consent to do so, we may post your first and last name along with your feedback on our website. We will collect any information contained in such feedback and will treat the personal data in it in accordance with this Policy.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EInternational Data Transfer\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EYour information, including personal data that we collect from you, may be transferred to, stored at and processed by us outside the country in which you reside, where data protection and privacy regulations may not offer the same level of protection as in other parts of the world. By accepting this Policy, you agree to this transfer, storing or processing. We will take all steps reasonably necessary to ensure that your data is treated securely and in accordance with this Policy.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003ESecurity\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EWe seek to use reasonable organizational, technical and administrative measures to protect personal data within our organization. Unfortunately, no transmission or storage system can be guaranteed to be completely secure, and transmission of information via the Internet is not completely secure. If you have reason to believe that your interaction with us is no longer secure (for example, if you feel that the security of any account you might have with us has been compromised), please immediately notify us of the problem by contacting us.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003ERetention\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EWe will only retain your personal data as long reasonably required for you to use the website until you close your account\u002Fcancel your subscription unless a longer retention period is required or permitted by law (for example for regulatory purposes).\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EOur Policy on Children\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EOur website is\u002Fare not directed to children under 16.\u003Cstrong\u003E \u003C\u002Fstrong\u003EIf a parent or guardian becomes aware that his or her child has provided us with information without their consent, he or she should contact us. We will delete such information from our files as soon as reasonably practicable.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EYour Rights\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cul\u003E\u003Cli\u003E\u003Cstrong\u003EOpt-out. \u003C\u002Fstrong\u003EYou may contact us anytime to opt-out of: (i) direct marketing communications; (ii) automated decision-making and\u002For profiling; (iii) our collection of sensitive personal data; (iv) any new processing of your personal data that we may carry out beyond the original purpose; or (v) the transfer of your personal data outside the EEA. Please note that your use of some of the website may be ineffective upon opt-out.\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EAccess. \u003C\u002Fstrong\u003EYou may access the information we hold about you at any time via your profile\u002Faccount or by contacting us directly.\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EAmend. \u003C\u002Fstrong\u003EYou can also contact us to update or correct any inaccuracies in your personal data.\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EMove. \u003C\u002Fstrong\u003EYour personal data is portable – i.e. you to have the flexibility to move your data to other service providers as you wish.\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EErase and forget. \u003C\u002Fstrong\u003EIn certain situations, for example when the information we hold about you is no longer relevant or is incorrect, you can request that we erase your data.\u003C\u002Fli\u003E\u003C\u002Ful\u003E\u003Cp\u003EIf you wish to exercise any of these rights, please contact us. In your request, please make clear: (i) \u003Cstrong\u003Ewhat\u003C\u002Fstrong\u003E personal data is concerned; and (ii) \u003Cstrong\u003Ewhich of the above rights\u003C\u002Fstrong\u003E you would like to enforce. For your protection, we may only implement requests with respect to the personal data associated with the particular email address that you use to send us your request, and we may need to verify your identity before implementing your request. We will try to comply with your request as soon as reasonably practicable and in any event, within one month of your request. Please note that we may need to retain certain information for recordkeeping purposes and\u002For to complete any transactions that you began prior to requesting such change or deletion.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EComplaints\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EWe are committed to resolve any complaints about our collection or use of your personal data. If you would like to make a complaint regarding this Policy or our practices in relation to your personal data, please contact us through the information listed on our website. We will reply to your complaint as soon as we can and in any event, within 30 days. We hope to resolve any complaint brought to our attention, however if you feel that your complaint has not been adequately resolved, you reserve the right to contact your local data protection supervisory authority\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EContact Information\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EWe welcome your comments or questions about this Policy. You may contact us in writing or through our website.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E",Terms:"\u003Cp\u003E\u003Cstrong\u003ETerms of Use\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EEffective as of May 9, 2020.\u003C\u002Fp\u003E\u003Cp\u003EWelcome to the Self-employment (the \"Service\"). The following Terms of Use apply when you view or use the Service located at: https:\u002F\u002Fblogweb.me. Please review the following terms carefully. By accessing or using the Service, you signify your agreement to these Terms of Use. If you do not agree to these Terms of Use, you may not access or use the Service.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EPRIVACY POLICY\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EThe company respects the privacy of its Service users. Please refer to the Company's Privacy Policy which explains how we collect, use, and disclose information that pertains to your privacy. When you access or use the Service, you signify your agreement to this Privacy Policy.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EREGISTRATION; RULES FOR USER CONDUCT AND USE OF THE SERVICE\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou need to be at least 16 years old to register for and use the Service.\u003C\u002Fp\u003E\u003Cp\u003EIf you are a user who signs up for the Service, the company will create a personalized account, which includes a unique username and a password to access the Service and allow you to receive messages from the Company. You agree to notify us immediately of any unauthorized use of your password and\u002For account. The Company will not be responsible for any liabilities, losses, or damages arising out of the unauthorized use of your member name, password and\u002For account.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EUSE RESTRICTIONS.\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EYour permission to use the Site is conditioned upon the following Use Restrictions and Conduct Restrictions: You agree that you will not under any circumstances:\u003C\u002Fp\u003E\u003Cul\u003E\u003Cli\u003Epost any information that is abusive, threatening, obscene, defamatory, libelous, or racially, sexually, religiously, or otherwise objectionable and offensive;\u003C\u002Fli\u003E\u003Cli\u003Euse the service for any unlawful purpose or for the promotion of illegal activities;\u003C\u002Fli\u003E\u003Cli\u003Eattempt to, or harass, abuse or harm another person or group;\u003C\u002Fli\u003E\u003Cli\u003Euse another user's account without permission;\u003C\u002Fli\u003E\u003Cli\u003Eprovide false or inaccurate information when registering an account;\u003C\u002Fli\u003E\u003Cli\u003Einterfere or attempt to interfere with the proper functioning of the Service;\u003C\u002Fli\u003E\u003Cli\u003Emake any automated use of the system, or take any action that we deem to impose or to potentially impose an unreasonable or disproportionately large load on our servers or network infrastructure;\u003C\u002Fli\u003E\u003Cli\u003Ebypass any robot exclusion headers or other measures we take to restrict access to the Service or use any software, technology, or device to scrape, spider, or crawl the Service or harvest or manipulate data; or\u003C\u002Fli\u003E\u003Cli\u003Epublish or link to malicious content intended to damage or disrupt another user's browser or computer.\u003C\u002Fli\u003E\u003C\u002Ful\u003E\u003Cp\u003E\u003Cstrong\u003EPOSTING AND CONDUCT RESTRICTIONS.\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EWhen you create your own personalized account, you may be able to provide (\"User Content\"). You are solely responsible for the User Content that you post, upload, link to or otherwise make available via the Service. You agree that we are only acting as a passive conduit for your online distribution and publication of your User Content. The Company, however, reserves the right to remove any User Content from the Service at its discretion.\u003C\u002Fp\u003E\u003Cp\u003EThe following rules pertain to User Content. By transmitting and submitting any User Content while using the Service, you agree as follows:\u003C\u002Fp\u003E\u003Cul\u003E\u003Cli\u003EYou are solely responsible for your account and the activity that occurs while signed in to or while using your account;\u003C\u002Fli\u003E\u003Cli\u003EYou will not post information that is malicious, false or inaccurate;\u003C\u002Fli\u003E\u003Cli\u003EYou will not submit content that is copyrighted or subject to third party proprietary rights, including privacy, publicity, trade secret, etc., unless you are the owner of such rights or have the appropriate permission from their rightful owner to specifically submit such content; and\u003C\u002Fli\u003E\u003Cli\u003EYou hereby affirm we have the right to determine whether any of your User Content submissions are appropriate and comply with these Terms of Service, remove any and\u002For all of your submissions, and terminate your account with or without prior notice.\u003C\u002Fli\u003E\u003C\u002Ful\u003E\u003Cp\u003EYou understand and agree that any liability, loss or damage that occurs as a result of the use of any User Content that you make available or access through your use of the Service is solely your responsibility. The Company is not responsible for any public display or misuse of your User Content. The Company does not, and cannot, pre-screen or monitor all User Content. However, at our discretion, we, or the technology we employ, may monitor and\u002For record your interactions with the Service.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EONLINE CONTENT DISCLAIMER\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EOpinions, advice, statements, offers, or other information or content made available through the Service, but not directly by the Company, are those of their respective authors, and should not necessarily be relied upon. Such authors are solely responsible for such content. The Company does not guarantee the accuracy, completeness, or usefulness of any information on the Service and neither does the Company adopt nor endorse, nor is the Company responsible for the accuracy or reliability of any opinion, advice, or statement made by parties other than the Company. The Company takes no responsibility and assumes no liability for any User Content that you or any other user or third party posts or sends over the Service. Under no circumstances will the Company be responsible for any loss or damage resulting from anyone's reliance on information or other content posted on the Service, or transmitted to users.\u003C\u002Fp\u003E\u003Cp\u003EThough the Company strives to enforce these Terms of Use, you may be exposed to User Content that is inaccurate or objectionable. The Company reserves the right, but has no obligation, to monitor the materials posted in the public areas of the service or to limit or deny a user's access to the Service or take other appropriate action if a user violates these Terms of Use or engages in any activity that violates the rights of any person or entity or which we deem unlawful, offensive, abusive, harmful or malicious. The Company shall have the right to remove any such material that in its sole opinion violates, or is alleged to violate, the law or this agreement or which might be offensive, or that might violate the rights, harm, or threaten the safety of users or others. Unauthorized use may result in criminal and\u002For civil prosecution under the law. If you become aware of misuse of our Service, please contact us at https:\u002F\u002Fblogweb.me.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003ELINKS TO OTHER SITES AND\u002FOR MATERIALS\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EAs part of the Service, the Company may provide you with convenient links to third party web site(s) (\"Third Party Sites\") as well as content or items belonging to or originating from third parties (the\"Third Party Applications, Software or Content\"). These links are provided as a courtesy to Service subscribers. The Company has no control over Third Party Sites and Third Party Applications, Software or Content or the promotions, materials, information, goods or services available on these Third Party Sites or Third Party Applications, Software or Content. Such Third Party Sites and Third Party Applications, Software or Content are not investigated, monitored or checked for accuracy, appropriateness, or completeness by the Company, and the Company is not responsible for any Third Party Sites accessed through the Site or any Third Party Applications, Software or Content posted on, available through or installed from the Site, including the content, accuracy, offensiveness, opinions, reliability, privacy practices or other policies of or contained in the Third Party Sites or the Third Party Applications, Software or Content. Inclusion of, linking to or permitting the use or installation of any Third Party Site or any Third Party Applications, Software or Content does not imply approval or endorsement thereof by the Company. If you decide to leave the Site and access the Third Party Sites or to use or install any Third Party Applications, Software or Content, you do so at your own risk and you should be aware that our terms and policies no longer govern. You should review the applicable terms and policies, including privacy and data gathering practices, of any site to which you navigate from the Site or relating to any applications you use or install from the site.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003ECOPYRIGHT COMPLAINTS AND COPYRIGHT AGENT\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003E(a) Termination of Repeat Infringe Accounts. The Company respects the intellectual property rights of others and requests that the users do the same. The Company has adopted and implemented a policy that provides for the termination in appropriate circumstances of users of the Service who are repeat infringers The Company may terminate access for participants or users who are found repeatedly to provide or post protected third party content without necessary rights and permissions.\u003C\u002Fp\u003E\u003Cp\u003E(b) Take-Down Notices. If you are a copyright owner or an agent thereof and believe, in good faith, that any materials provided on the Service infringe upon your copyrights, you may submit a notification pursuant by sending the following information in writing to the Company's designated copyright agent at Self-employment:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EThe date of your notification;\u003C\u002Fli\u003E\u003Cli\u003EA Physical or electronic signature of a person authorized to act on behalf of the owner of an exclusive right that is allegedly infringed;\u003C\u002Fli\u003E\u003Cli\u003EA description of the copyrighted work claimed to have been infringed, or, if multiple copyrighted works at a single online site are recovered by a single notification, a representative list of such works at that site;\u003C\u002Fli\u003E\u003Cli\u003EA description of the material that is claimed to be infringing or to be the subject of infringing activity and information sufficient to enable us to locate such work;\u003C\u002Fli\u003E\u003Cli\u003EInformation reasonably sufficient to permit the service provider to contact you, such as an address, telephone number, and\u002For email address;\u003C\u002Fli\u003E\u003Cli\u003EA statement that you have a good faith belief that use of the material in the manner complained of is not authorized by the copyright owner, its agent, or the law; and\u003C\u002Fli\u003E\u003Cli\u003EA statement that the information in the notification is accurate, and under penalty of perjury, that you are authorized to act on behalf of the owner of an exclusive right that is allegedly infringed.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E(c) Counter-Notices. If you believe that your User Content that has been removed from the Site is not infringing, or that you have the authorization from the copyright owner, the copyright owner's agent, or pursuant to the law, to post and use the content in your User Content, you may send a counter-notice containing the following information to our copyright agent using the contact information set forth above:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003EYour physical or electronic signature;\u003C\u002Fli\u003E\u003Cli\u003EA description of the content that has been removed and the location at which the content appeared before it was removed;\u003C\u002Fli\u003E\u003Cli\u003EA statement that you have a good faith belief that the content was removed as a result of mistake or a misidentification of the content; and\u003C\u002Fli\u003E\u003Cli\u003EYour name, address, telephone number, and email address, a statement that you consent to the laws of California and a statement that you will accept service of process from the person who provided notification of the alleged infringement.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003EIf a counter-notice is received by the Company copyright agent, the Company may send a copy of the counter-notice to the original complaining party informing such person that it may reinstate the removed content in 10 business days. Unless the copyright owner files an action seeking a court order against the content provider, member or user, the removed content may (in the Company's discretion) be reinstated on the Site in 10 to 14 business days or more after receipt of the counter-notice.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003ELICENSE GRANT\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EBy posting any User Content via the Service, you expressly grant, and you represent and warrant that you have a right to grant, to the Company a royalty-free, sub licensable, transferable, perpetual, irrevocable, non-exclusive, worldwide license to use, reproduce, modify, publish, list information regarding, edit, translate, distribute, publicly perform, publicly display, and make derivative works of all such User Content and your name, voice, and\u002For likeness as contained in your User Content, if applicable, in whole or impart, and in any form, media or technology, whether now known or hereafter developed, for use in connection with the Service.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EINTELLECTUAL PROPERTY\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EYou acknowledge and agree that we and our licensors retain ownership of all intellectual property rights of any kind related to the Service, including applicable copyrights, trademarks and other proprietary rights. Other product and business names that are mentioned on the Service may be trademarks of their respective owners. We reserve all rights that are not expressly granted to you under this Agreement.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EEMAIL MAY NOT BE USED TO PROVIDE NOTICE\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003ECommunications made through the Service's e-mail and messaging system, will not constitute legal notice to the Company or any of its officers, employees, agents or representatives in any situation where notice to the Company is required by contract or any law or regulation.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EUSER CONSENT TO RECEIVE COMMUNICATIONS IN ELECTRONIC FORM\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003EFor contractual purposes, you (a) consent to receive communications from the Company in an electronic form via the email address you have submitted; and (b) agree that all Terms of Use, agreements, notices, disclosures, and other communications that the Company provides to you electronically satisfy any legal requirement that such communications would satisfy if it were in writing. The foregoing does not affect your non-waivable rights.\u003C\u002Fp\u003E\u003Cp\u003EWe may also use your email address, to send you other messages, including information about the Company and special offers. You may opt out of such email by changing your account settings or sending an email to Self-employment.\u003C\u002Fp\u003E\u003Cp\u003EOpting out may prevent you from receiving messages regarding the Company or Special Offers.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003EWARRANTY\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003ETHE SERVICE, IS PROVIDED \"AS IS,\" WITHOUT WARRANTY OF ANY KIND. WITHOUT LIMITING THE FOREGOING, THE COMPANY EXPRESSLY DISCLAIMS ALL WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, REGARDING THE SERVICE INCLUDING WITHOUT LIMITATION ANY WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, SECURITY, ACCURACY AND NON-INFRINGEMENT. WITHOUT LIMITING THE FOREGOING, THE COMPANY MAKES NO WARRANTY OR REPRESENTATION THAT ACCESS TO OR OPERATION OF THE SERVICE WILL BE UNINTERRUPTED OR ERROR FREE. YOU ASSUME FULL RESPONSIBILITY AND RISK OF LOSS RESULTING FROM YOUR DOWNLOADING AND\u002FOR USE OF FILES, INFORMATION, CONTENT OR OTHER MATERIAL OBTAINED FROM THE SERVICE. SOME JURISDICTIONS LIMIT OR DO NOT PERMIT DISCLAIMERS OF WARRANTY, SO THIS PROVISION MAY NOT APPLY TO YOU.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cstrong\u003ELIMITATION OF DAMAGES; RELEASE\u003C\u002Fstrong\u003E\u003C\u002Fp\u003E\u003Cp\u003ETO THE EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL THE COMPANY, ITS AFFILIATES, DIRECTORS, OR EMPLOYEES, OR ITS LICENSORS OR PARTNERS, BE LIABLE TO YOU FOR ANY LOSS OF PROFITS, USE, OR DATA, OR FOR ANY INCIDENTAL, INDIRECT, SPECIAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES, HOWEVER ARISING, THAT RESULT FROM (A) THE USE, DISCLOSURE, OR DISPLAY OF YOUR USER CONTENT; (B) YOUR USE OR INABILITY TO USE THE SERVICE; (C) THE SERVICE GENERALLY OR THE SOFTWARE OR SYSTEMS THAT MAKE THE SERVICE AVAILABLE; OR (D) ANY OTHER INTERACTIONS WITH THE COMPANY OR ANY OTHER USER OF THE SERVICE, WHETHER BASED ON WARRANTY, CONTRACT, TORT (INCLUDING NEGLIGENCE) OR ANY OTHER LEGAL THEORY, AND WHETHER OR NOT THE COMPANY HAS BEEN INFORMED OF THE POSSIBILITY OF SUCH DAMAGE, AND EVEN IF A REMEDY SET FORTH HEREIN IS FOUND TO HAVE FAILED OF ITS ESSENTIAL PURPOSE. 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YOU FURTHER ACKNOWLEDGE THAT THESE TERMS OF USE TOGETHER WITH THE PRIVACY POLICY AT https:\u002F\u002Fblogweb.me REPRESENT THE COMPLETE AND EXCLUSIVE STATEMENT OF THE AGREEMENT BETWEEN US AND THAT IT SUPERSEDES ANY PROPOSAL OR PRIOR AGREEMENT ORAL OR WRITTEN, AND ANY OTHER COMMUNICATIONS BETWEEN US RELATING TO THE SUBJECT MATTER OF THIS AGREEMENT.\u003C\u002Fp\u003E\u003Cp class=\"ql-align-right\"\u003E\u003Cbr\u003E\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u003E\u003C\u002Fp\u003E",Domain:aH,Plan:f,PlanExpired:"2100-01-01T00:00:00Z",Port:U,Active:f,Rating:b,CountVoted:b,Trusted:c,CreatedIp:a,Subject:{Id:34,Name:a,Slug:a,Icon:a,MetaTitle:a,MetaDescription:a,Locale:g,Site:g,Created:e,Updated:e},Settings:{Id:i,Title:h,Logo:aI,Locale:aJ,RobotsTxt:aK,FooterCode:aL,Description:h,Activation:aM,ScrollablePagination:b,AddWatermark:b,AddWatermarkPosition:b,LayoutSettings:{Id:i,Name:a,IsDark:b,BackgroundFull:b,PageTransition:a,CodeTheme:a,Background:a,BackgroundColor:a,TextColor:a,TextFontFamily:a,PrimaryColor:a,SecondaryColor:a,AccentColor:a,InfoColor:a,SuccessColor:a,ErrorColor:a,WarningColor:a,Created:e,Updated:e},ForumSettings:g,BlogSettings:{Id:i,Toc:b,TocCollapse:b,AddSource:b,AddSourceText:a,IsRelatedPost:b,RelatedPost:b,Created:e,Updated:e},MailSettings:{Id:32,Host:a,Email:a,FromName:a,User:a,Password:a,Encryption:a,Port:b,Created:e,Updated:e},SocialSettings:g,SecuritySettings:{Id:i,ThreadLimit:b,ThreadLimitType:b,RegisterLimit:b,RegisterLimitType:b,PostLimit:b,CommentLimitType:b,CommentLimit:b,PostLimitType:b,MessagesBeforeAutoApproved:b,MarkUncertainMessages:c,SecurityQuestions:g,Created:e,Updated:e},Created:aN,Updated:"2021-03-22T23:49:34Z"},User:{Id:500,Username:a,FirstName:a,Avatar:a,LastName:a,Company:a,Email:a,ConfirmationToken:a,CreatedIp:a,RestoreToken:a,PasswordRequestedAt:e,Password:a,Active:b,Trusted:c,Banned:b,Notifications:b,Role:g,Site:g,LastLogin:e,Created:e,Updated:e},Category:g,Created:aN,Updated:"2022-08-15T17:41:47Z"},title:m,summary:"NULL values in MySQL refer to the absence of a value in a field. They can occur when you insert or update a record without specifying a value for that field, or when a certain field does not have any meaningful data to be stored.To handle NULL values in MySQL, you can:Check for NULL values using the IS NULL operator:\nSELECT * FROM table_name WHERE column_name IS NULL;\nThis query will return all records where the specified column has a NULL value.",content:"\u003Cp\u003ENULL values in MySQL refer to the absence of a value in a field. They can occur when you insert or \u003Ca class=\"auto-link\" href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-update-records-in-a-mysql-table\"\u003Eupdate\u003C\u002Fa\u003E a record without specifying a value for that field, or when a certain field does not have any meaningful data to be stored.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo handle NULL values in MySQL, you can:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for NULL values using the IS NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE \u003Ca class=\"auto-link\" href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-get-the-not-null-column-name-in-a-mysql\"\u003Ecolumn_name IS NULL\u003C\u002Fa\u003E;\nThis query will return all records where the specified column has a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for non-NULL values using the IS NOT NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE column_name IS NOT NULL;\nThis query will return all records where the specified column does not have a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EHandle NULL values in calculations or expressions using the IFNULL() function\u003C\u002Fstrong\u003E:\nSELECT column_name, IFNULL(column_name, 'default_value') FROM table_name;\nThe IFNULL() function allows you to specify a default value that will be used in case the column contains a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EAssign a default value to a column when creating a table\u003C\u002Fstrong\u003E:\nCREATE TABLE table_name (\ncolumn_name data_type DEFAULT default_value\n);\nBy providing a default value when creating a table, you ensure that the column will always have a value, even if it is not explicitly defined during insertion.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse the COALESCE() function to handle NULL values and select the first non-NULL value from a list of expressions\u003C\u002Fstrong\u003E:\nSELECT column_name, COALESCE(column1, column2, 'default_value') FROM table_name;\nThe COALESCE() function returns the first non-NULL value from the list of expressions. If all expressions are NULL, it will return the specified default value.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBy understanding how NULL values work in MySQL and utilizing these techniques, you can effectively handle and manage NULL values in your database operations.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Managed Hosting Providers in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fvultr.png\" alt=\"Vultr\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EVultr\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Ultra-fast Intel Core\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n High Performance and Cheap Cloud Dedicated Servers\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n 1 click install Wordpress\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Low Price and High Quality\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FTh8WHkbGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fdigital.png\" alt=\"Digital Ocean\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EDigital Ocean\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Active Digital Community\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Simple Control Panel\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Starting from 5$ per month\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FwbuWNkxGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to check if a value is NULL in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can use the IS NULL operator to check if a value is NULL. Here is an example query:\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ESELECT * FROM table_name WHERE column_name IS NULL;\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EReplace "table_name" with the name of your table, and "column_name" with the name of the column you want to check for NULL values. The query will return all rows in which the specified column has a NULL value.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EWhat is the default behavior of NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe default behavior of NULL values in MySQL is to treat them as unknown or missing values. NULL is not the same as an empty string or zero; it represents the absence of a value. When performing calculations or comparisons involving NULL, the result will also be NULL. However, some functions and operators in MySQL may treat NULL values differently.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values in case statements in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can handle NULL values in case statements using the COALESCE() function or by explicitly checking for NULL values.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EUsing COALESCE()\u003C\u002Fstrong\u003E:\nThe COALESCE() function allows you to return the first non-null value from a list. You can use it in a \u003Ca href=\"https:\u002F\u002Felvanco.com\u002Fblog\u002Fhow-to-use-case-when-in-another-case-when-condition\" class=\"auto-link\" target=\"_blank\"\u003Ecase statement\u003C\u002Fa\u003E to handle NULL values. Here's an example:\nSELECT col1, col2, COALESCE(col3, 'N\u002FA') AS col3\nFROM your_table;\nIn the above example, if col3 is NULL, it will be replaced with 'N\u002FA' in the result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EExplicitly checking for NULL\u003C\u002Fstrong\u003E:\nIf you want to perform specific operations or have different outputs for NULL values, you can explicitly check for NULL. Here's an example:\nSELECT col1,\nCASE\nWHEN col2 IS NULL THEN 'No value'\nELSE col2\nEND AS col2\nFROM your_table;\nIn the above example, if col2 is NULL, it will be replaced with 'No value' in the result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBoth methods allow you to handle NULL values in case statements in MySQL. Choose the one that best fits your requirements.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Database Books to Read in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51duw5p-6fl-sl160.jpg\" alt=\"Murach's MySQL (3rd Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's MySQL (3rd Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuh5bqW4Ig\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41m0q0rwm9l-sl160.jpg\" alt=\"Learning MySQL: Get a Handle on Your Data\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003ELearning MySQL: Get a Handle on Your Data\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fch5b3ZVIR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 3\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51wz-rn4dl-sl160.jpg\" alt=\"MySQL Crash Course: A Hands-on Introduction to Database Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.8 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.8;\" aria-label=\"Rating is 4.8 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Crash Course: A Hands-on Introduction to Database Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FSo5b3WVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 4\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F31f7dqnxj2l-sl160.jpg\" alt=\"PHP & MySQL: Server-side Web Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.7 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.7;\" aria-label=\"Rating is 4.7 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EPHP & MySQL: Server-side Web Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FU2cb3Z4IR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 5\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51zosxntq9l-sl160.jpg\" alt=\"MySQL Cookbook: Solutions for Database Developers and Administrators\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.6 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.6;\" aria-label=\"Rating is 4.6 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Cookbook: Solutions for Database Developers and Administrators\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fx25xqZ4Sg\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 6\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41i36vwllil-sl160.jpg\" alt=\"The MySQL Workshop: A practical guide to working with data and managing databases with MySQL\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.5;\" aria-label=\"Rating is 4.5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EThe MySQL Workshop: A practical guide to working with data and managing databases with MySQL\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuo5bqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 7\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51ebfs-hnil-sl160.jpg\" alt=\"Murach's PHP and MySQL (4th Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.4 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.4;\" aria-label=\"Rating is 4.4 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's PHP and MySQL (4th Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FPAcxqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 8\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51e5rrekjcl-sl160.jpg\" alt=\"High Performance MySQL: Proven Strategies for Operating at Scale\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.3 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.3;\" aria-label=\"Rating is 4.3 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EHigh Performance MySQL: Proven Strategies for Operating at Scale\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FBTcx3Z4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 9\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51j9jyeotkl-sl160.jpg\" alt=\"MySQL(TM): The Complete Reference\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.2 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.2;\" aria-label=\"Rating is 4.2 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL(TM): The Complete Reference\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FJ05bqWVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values when using the IN operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen using the IN operator in MySQL, you need to be aware of how it handles NULL values. Here are a few ways to handle NULL values when using the IN operator:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EExclude NULL values\u003C\u002Fstrong\u003E: If you want to exclude NULL values from your result set, you can use the IS NOT NULL condition before the IN operator. For example:\nSELECT * FROM table WHERE column IS NOT NULL AND column IN (value1, value2, value3);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EInclude NULL values\u003C\u002Fstrong\u003E: If you want to include NULL values in your result set, you can explicitly include NULL in the list of values used in the IN operator. For example:\nSELECT * FROM table WHERE column IN (value1, value2, value3, NULL);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse IS NULL condition\u003C\u002Fstrong\u003E: If you want to specifically check for NULL values in a column without using the IN operator, you can use the IS NULL condition. For example:\nSELECT * FROM table WHERE column IS NULL;\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIt's important to note that the behavior of the IN operator with NULL values may vary depending on the version of MySQL you are using. Therefore, it's recommended to test and validate the results when dealing with NULL values and the IN operator.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to update NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003ETo update NULL values in MySQL, you can use the UPDATE statement along with the IS NULL condition.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere is an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-kjvft9o\"\u003EUPDATE your_table\nSET column_name = new_value\nWHERE column_name IS NULL;\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn the above query, \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E is the name of the table you want to update, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E is the name of the specific column that contains the NULL values, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E is the value you want to update the NULL values with.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EMake sure to replace \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E with the appropriate values specific to your database.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values while performing joins in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen performing joins in MySQL, there are a few ways to handle NULL values:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EINNER JOIN\u003C\u002Fstrong\u003E: By default, the INNER JOIN only returns rows where there is a match in both tables. Therefore, NULL values are automatically excluded from the result set. No additional handling is required.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ELEFT JOIN or RIGHT JOIN\u003C\u002Fstrong\u003E: These join types return all the rows from one table (left or right) and the matching rows from the other table. If there is no match, NULL values are used for the columns of the other table. To handle NULL values in these types of joins, you can use functions like ISNULL(), COALESCE(), or IFNULL() to replace the NULL values with a specific value or perform some other calculation.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EExample:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-qmizqjp\"\u003ESELECT t1.column1, t2.column2\nFROM table1 t1\nLEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, if there is no match in table2 for a row in table1, t2.column2 will be NULL. You can handle this using the COALESCE() function to display a different value instead of NULL:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-p4qdwuu\"\u003ESELECT t1.column1, COALESCE(t2.column2, 'N\u002FA') AS column2\nFROM table1 t1\nLEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere, if t2.column2 is NULL, 'N\u002FA' will be displayed instead.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECROSS JOIN\u003C\u002Fstrong\u003E: CROSS JOIN is used to produce Cartesian products, resulting in every combination of rows from both tables. Since NULL is not excluded in any way, no special handling is needed.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIt's important to note that handling NULL values in joins depends on your specific requirements and the context of your data. Be cautious when using functions like ISNULL(), COALESCE(), or IFNULL() as they can impact the performance of your query.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EWhat is the impact of NULL values on the UNION operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe UNION operator in MySQL combines the result sets of two or more SELECT statements into a single result set. When handling NULL values, the impact on the UNION operator is as follows:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the first SELECT statement\u003C\u002Fstrong\u003E: If a row in the first SELECT statement contains NULL values in the corresponding columns of the second SELECT statement, those rows will be included in the merged result set. However, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the second SELECT statement\u003C\u002Fstrong\u003E: If a row in the second SELECT statement contains NULL values in the corresponding columns of the first SELECT statement, those rows will be included in the merged result set. However, if a row in the second SELECT statement has NULL values in the corresponding columns of the first SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUNION ALL and NULL values\u003C\u002Fstrong\u003E: If the UNION operator is modified with UNION ALL, which retains duplicate rows, NULL values will be considered as distinct values. Therefore, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, and the second SELECT statement also contains rows with NULL values in those columns, both the rows will be included in the merged result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn summary, when using the UNION operator, NULL values can impact whether certain rows are included in the merged result set depending on how they are matched between the SELECT statements, and their treatment may vary based on whether UNION or UNION ALL is used.\u003C\u002Fp\u003E",content_ad:"\u003Cp\u003ENULL values in MySQL refer to the absence of a value in a field. They can occur when you insert or \u003Ca class=\"auto-link\" href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-update-records-in-a-mysql-table\"\u003Eupdate\u003C\u002Fa\u003E a record without specifying a value for that field, or when a certain field does not have any meaningful data to be stored.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo handle NULL values in MySQL, you can:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for NULL values using the IS NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE \u003Ca class=\"auto-link\" href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-get-the-not-null-column-name-in-a-mysql\"\u003Ecolumn_name IS NULL\u003C\u002Fa\u003E;\nThis query will return all records where the specified column has a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for non-NULL values using the IS NOT NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE column_name IS NOT NULL;\nThis query will return all records where the specified column does not have a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EHandle NULL values in calculations or expressions using the IFNULL() function\u003C\u002Fstrong\u003E:\nSELECT column_name, IFNULL(column_name, 'default_value') FROM table_name;\nThe IFNULL() function allows you to specify a default value that will be used in case the column contains a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EAssign a default value to a column when creating a table\u003C\u002Fstrong\u003E:\nCREATE TABLE table_name (\ncolumn_name data_type DEFAULT default_value\n);\nBy providing a default value when creating a table, you ensure that the column will always have a value, even if it is not explicitly defined during insertion.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse the COALESCE() function to handle NULL values and select the first non-NULL value from a list of expressions\u003C\u002Fstrong\u003E:\nSELECT column_name, COALESCE(column1, column2, 'default_value') FROM table_name;\nThe COALESCE() function returns the first non-NULL value from the list of expressions. If all expressions are NULL, it will return the specified default value.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBy understanding how NULL values work in MySQL and utilizing these techniques, you can effectively handle and manage NULL values in your database operations.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Managed Hosting Providers in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fvultr.png\" alt=\"Vultr\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EVultr\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Ultra-fast Intel Core\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n High Performance and Cheap Cloud Dedicated Servers\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n 1 click install Wordpress\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Low Price and High Quality\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FTh8WHkbGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fdigital.png\" alt=\"Digital Ocean\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EDigital Ocean\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Active Digital Community\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Simple Control Panel\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Starting from 5$ per month\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FwbuWNkxGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to check if a value is NULL in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can use the IS NULL operator to check if a value is NULL. Here is an example query:\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ESELECT * FROM table_name WHERE column_name IS NULL;\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Cp\u003EReplace "table_name" with the name of your table, and "column_name" with the name of the column you want to check for NULL values. The query will return all rows in which the specified column has a NULL value.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EWhat is the default behavior of NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe default behavior of NULL values in MySQL is to treat them as unknown or missing values. NULL is not the same as an empty string or zero; it represents the absence of a value. When performing calculations or comparisons involving NULL, the result will also be NULL. However, some functions and operators in MySQL may treat NULL values differently.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values in case statements in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can handle NULL values in case statements using the COALESCE() function or by explicitly checking for NULL values.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EUsing COALESCE()\u003C\u002Fstrong\u003E:\nThe COALESCE() function allows you to return the first non-null value from a list. You can use it in a \u003Ca href=\"https:\u002F\u002Felvanco.com\u002Fblog\u002Fhow-to-use-case-when-in-another-case-when-condition\" class=\"auto-link\" target=\"_blank\"\u003Ecase statement\u003C\u002Fa\u003E to handle NULL values. Here's an example:\nSELECT col1, col2, COALESCE(col3, 'N\u002FA') AS col3\nFROM your_table;\nIn the above example, if col3 is NULL, it will be replaced with 'N\u002FA' in the result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EExplicitly checking for NULL\u003C\u002Fstrong\u003E:\nIf you want to perform specific operations or have different outputs for NULL values, you can explicitly check for NULL. Here's an example:\nSELECT col1,\nCASE\nWHEN col2 IS NULL THEN 'No value'\nELSE col2\nEND AS col2\nFROM your_table;\nIn the above example, if col2 is NULL, it will be replaced with 'No value' in the result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBoth methods allow you to handle NULL values in case statements in MySQL. Choose the one that best fits your requirements.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Database Books to Read in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51duw5p-6fl-sl160.jpg\" alt=\"Murach's MySQL (3rd Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's MySQL (3rd Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuh5bqW4Ig\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41m0q0rwm9l-sl160.jpg\" alt=\"Learning MySQL: Get a Handle on Your Data\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003ELearning MySQL: Get a Handle on Your Data\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fch5b3ZVIR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 3\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51wz-rn4dl-sl160.jpg\" alt=\"MySQL Crash Course: A Hands-on Introduction to Database Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.8 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.8;\" aria-label=\"Rating is 4.8 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Crash Course: A Hands-on Introduction to Database Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FSo5b3WVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 4\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F31f7dqnxj2l-sl160.jpg\" alt=\"PHP & MySQL: Server-side Web Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.7 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.7;\" aria-label=\"Rating is 4.7 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EPHP & MySQL: Server-side Web Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FU2cb3Z4IR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 5\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51zosxntq9l-sl160.jpg\" alt=\"MySQL Cookbook: Solutions for Database Developers and Administrators\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.6 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.6;\" aria-label=\"Rating is 4.6 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Cookbook: Solutions for Database Developers and Administrators\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fx25xqZ4Sg\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 6\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41i36vwllil-sl160.jpg\" alt=\"The MySQL Workshop: A practical guide to working with data and managing databases with MySQL\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.5;\" aria-label=\"Rating is 4.5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EThe MySQL Workshop: A practical guide to working with data and managing databases with MySQL\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuo5bqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 7\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51ebfs-hnil-sl160.jpg\" alt=\"Murach's PHP and MySQL (4th Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.4 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.4;\" aria-label=\"Rating is 4.4 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's PHP and MySQL (4th Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FPAcxqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 8\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51e5rrekjcl-sl160.jpg\" alt=\"High Performance MySQL: Proven Strategies for Operating at Scale\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.3 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.3;\" aria-label=\"Rating is 4.3 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EHigh Performance MySQL: Proven Strategies for Operating at Scale\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FBTcx3Z4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 9\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51j9jyeotkl-sl160.jpg\" alt=\"MySQL(TM): The Complete Reference\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.2 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.2;\" aria-label=\"Rating is 4.2 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL(TM): The Complete Reference\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FJ05bqWVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values when using the IN operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen using the IN operator in MySQL, you need to be aware of how it handles NULL values. Here are a few ways to handle NULL values when using the IN operator:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EExclude NULL values\u003C\u002Fstrong\u003E: If you want to exclude NULL values from your result set, you can use the IS NOT NULL condition before the IN operator. For example:\nSELECT * FROM table WHERE column IS NOT NULL AND column IN (value1, value2, value3);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EInclude NULL values\u003C\u002Fstrong\u003E: If you want to include NULL values in your result set, you can explicitly include NULL in the list of values used in the IN operator. For example:\nSELECT * FROM table WHERE column IN (value1, value2, value3, NULL);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse IS NULL condition\u003C\u002Fstrong\u003E: If you want to specifically check for NULL values in a column without using the IN operator, you can use the IS NULL condition. For example:\nSELECT * FROM table WHERE column IS NULL;\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Cp\u003EIt's important to note that the behavior of the IN operator with NULL values may vary depending on the version of MySQL you are using. Therefore, it's recommended to test and validate the results when dealing with NULL values and the IN operator.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to update NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003ETo update NULL values in MySQL, you can use the UPDATE statement along with the IS NULL condition.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere is an example:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-kjvft9o\"\u003EUPDATE your_table\nSET column_name = new_value\nWHERE column_name IS NULL;\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn the above query, \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E is the name of the table you want to update, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E is the name of the specific column that contains the NULL values, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E is the value you want to update the NULL values with.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EMake sure to replace \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E with the appropriate values specific to your database.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Ch2\u003EHow to handle NULL values while performing joins in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen performing joins in MySQL, there are a few ways to handle NULL values:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EINNER JOIN\u003C\u002Fstrong\u003E: By default, the INNER JOIN only returns rows where there is a match in both tables. Therefore, NULL values are automatically excluded from the result set. No additional handling is required.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ELEFT JOIN or RIGHT JOIN\u003C\u002Fstrong\u003E: These join types return all the rows from one table (left or right) and the matching rows from the other table. If there is no match, NULL values are used for the columns of the other table. To handle NULL values in these types of joins, you can use functions like ISNULL(), COALESCE(), or IFNULL() to replace the NULL values with a specific value or perform some other calculation.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EExample:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-qmizqjp\"\u003ESELECT t1.column1, t2.column2\nFROM table1 t1\nLEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, if there is no match in table2 for a row in table1, t2.column2 will be NULL. You can handle this using the COALESCE() function to display a different value instead of NULL:\u003C\u002Fp\u003E\u003Cpre class=\"code-block ql-syntax\" id=\"code-p4qdwuu\"\u003ESELECT t1.column1, COALESCE(t2.column2, 'N\u002FA') AS column2\nFROM table1 t1\nLEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fpre\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere, if t2.column2 is NULL, 'N\u002FA' will be displayed instead.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECROSS JOIN\u003C\u002Fstrong\u003E: CROSS JOIN is used to produce Cartesian products, resulting in every combination of rows from both tables. Since NULL is not excluded in any way, no special handling is needed.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIt's important to note that handling NULL values in joins depends on your specific requirements and the context of your data. Be cautious when using functions like ISNULL(), COALESCE(), or IFNULL() as they can impact the performance of your query.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Ch2\u003EWhat is the impact of NULL values on the UNION operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe UNION operator in MySQL combines the result sets of two or more SELECT statements into a single result set. When handling NULL values, the impact on the UNION operator is as follows:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the first SELECT statement\u003C\u002Fstrong\u003E: If a row in the first SELECT statement contains NULL values in the corresponding columns of the second SELECT statement, those rows will be included in the merged result set. However, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the second SELECT statement\u003C\u002Fstrong\u003E: If a row in the second SELECT statement contains NULL values in the corresponding columns of the first SELECT statement, those rows will be included in the merged result set. However, if a row in the second SELECT statement has NULL values in the corresponding columns of the first SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUNION ALL and NULL values\u003C\u002Fstrong\u003E: If the UNION operator is modified with UNION ALL, which retains duplicate rows, NULL values will be considered as distinct values. Therefore, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, and the second SELECT statement also contains rows with NULL values in those columns, both the rows will be included in the merged result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn summary, when using the UNION operator, NULL values can impact whether certain rows are included in the merged result set depending on how they are matched between the SELECT statements, and their treatment may vary based on whether UNION or UNION ALL is used.\u003C\u002Fp\u003E",formatted_content:"\u003Cp\u003ENULL values in MySQL refer to the absence of a value in a field. They can occur when you insert or \u003Ca href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-update-records-in-a-mysql-table\"\u003Eupdate\u003C\u002Fa\u003E a record without specifying a value for that field, or when a certain field does not have any meaningful data to be stored.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo handle NULL values in MySQL, you can:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for NULL values using the IS NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE \u003Ca href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-get-the-not-null-column-name-in-a-mysql\"\u003Ecolumn_name IS NULL\u003C\u002Fa\u003E;\nThis query will return all records where the specified column has a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for non-NULL values using the IS NOT NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE column_name IS NOT NULL;\nThis query will return all records where the specified column does not have a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EHandle NULL values in calculations or expressions using the IFNULL() function\u003C\u002Fstrong\u003E:\nSELECT column_name, IFNULL(column_name, 'default_value') FROM table_name;\nThe IFNULL() function allows you to specify a default value that will be used in case the column contains a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EAssign a default value to a column when creating a table\u003C\u002Fstrong\u003E:\nCREATE TABLE table_name (\ncolumn_name data_type DEFAULT default_value\n);\nBy providing a default value when creating a table, you ensure that the column will always have a value, even if it is not explicitly defined during insertion.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse the COALESCE() function to handle NULL values and select the first non-NULL value from a list of expressions\u003C\u002Fstrong\u003E:\nSELECT column_name, COALESCE(column1, column2, 'default_value') FROM table_name;\nThe COALESCE() function returns the first non-NULL value from the list of expressions. If all expressions are NULL, it will return the specified default value.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBy understanding how NULL values work in MySQL and utilizing these techniques, you can effectively handle and manage NULL values in your database operations.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Managed Hosting Providers in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fvultr.png\" alt=\"Vultr\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EVultr\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Ultra-fast Intel Core\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n High Performance and Cheap Cloud Dedicated Servers\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n 1 click install Wordpress\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Low Price and High Quality\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FTh8WHkbGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fdigital.png\" alt=\"Digital Ocean\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EDigital Ocean\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Active Digital Community\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Simple Control Panel\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Starting from 5$ per month\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FwbuWNkxGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to check if a value is NULL in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can use the IS NULL operator to check if a value is NULL. Here is an example query:\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ESELECT * FROM table_name WHERE column_name IS NULL;\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EReplace "table_name" with the name of your table, and "column_name" with the name of the column you want to check for NULL values. The query will return all rows in which the specified column has a NULL value.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EWhat is the default behavior of NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe default behavior of NULL values in MySQL is to treat them as unknown or missing values. NULL is not the same as an empty string or zero; it represents the absence of a value. When performing calculations or comparisons involving NULL, the result will also be NULL. However, some functions and operators in MySQL may treat NULL values differently.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values in case statements in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can handle NULL values in case statements using the COALESCE() function or by explicitly checking for NULL values.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EUsing COALESCE()\u003C\u002Fstrong\u003E:\nThe COALESCE() function allows you to return the first non-null value from a list. You can use it in a \u003Ca href=\"https:\u002F\u002Felvanco.com\u002Fblog\u002Fhow-to-use-case-when-in-another-case-when-condition\" target=\"_blank\"\u003Ecase statement\u003C\u002Fa\u003E to handle NULL values. Here's an example:\nSELECT col1, col2, COALESCE(col3, 'N\u002FA') AS col3\nFROM your_table;\nIn the above example, if col3 is NULL, it will be replaced with 'N\u002FA' in the result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EExplicitly checking for NULL\u003C\u002Fstrong\u003E:\nIf you want to perform specific operations or have different outputs for NULL values, you can explicitly check for NULL. Here's an example:\nSELECT col1,\nCASE\nWHEN col2 IS NULL THEN 'No value'\nELSE col2\nEND AS col2\nFROM your_table;\nIn the above example, if col2 is NULL, it will be replaced with 'No value' in the result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBoth methods allow you to handle NULL values in case statements in MySQL. Choose the one that best fits your requirements.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Database Books to Read in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51duw5p-6fl-sl160.jpg\" alt=\"Murach's MySQL (3rd Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's MySQL (3rd Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuh5bqW4Ig\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41m0q0rwm9l-sl160.jpg\" alt=\"Learning MySQL: Get a Handle on Your Data\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003ELearning MySQL: Get a Handle on Your Data\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fch5b3ZVIR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 3\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51wz-rn4dl-sl160.jpg\" alt=\"MySQL Crash Course: A Hands-on Introduction to Database Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.8 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.8;\" aria-label=\"Rating is 4.8 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Crash Course: A Hands-on Introduction to Database Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FSo5b3WVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 4\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F31f7dqnxj2l-sl160.jpg\" alt=\"PHP & MySQL: Server-side Web Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.7 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.7;\" aria-label=\"Rating is 4.7 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EPHP & MySQL: Server-side Web Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FU2cb3Z4IR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 5\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51zosxntq9l-sl160.jpg\" alt=\"MySQL Cookbook: Solutions for Database Developers and Administrators\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.6 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.6;\" aria-label=\"Rating is 4.6 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Cookbook: Solutions for Database Developers and Administrators\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fx25xqZ4Sg\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 6\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41i36vwllil-sl160.jpg\" alt=\"The MySQL Workshop: A practical guide to working with data and managing databases with MySQL\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.5;\" aria-label=\"Rating is 4.5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EThe MySQL Workshop: A practical guide to working with data and managing databases with MySQL\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuo5bqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 7\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51ebfs-hnil-sl160.jpg\" alt=\"Murach's PHP and MySQL (4th Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.4 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.4;\" aria-label=\"Rating is 4.4 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's PHP and MySQL (4th Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FPAcxqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 8\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51e5rrekjcl-sl160.jpg\" alt=\"High Performance MySQL: Proven Strategies for Operating at Scale\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.3 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.3;\" aria-label=\"Rating is 4.3 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EHigh Performance MySQL: Proven Strategies for Operating at Scale\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FBTcx3Z4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 9\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51j9jyeotkl-sl160.jpg\" alt=\"MySQL(TM): The Complete Reference\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.2 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.2;\" aria-label=\"Rating is 4.2 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL(TM): The Complete Reference\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FJ05bqWVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values when using the IN operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen using the IN operator in MySQL, you need to be aware of how it handles NULL values. Here are a few ways to handle NULL values when using the IN operator:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EExclude NULL values\u003C\u002Fstrong\u003E: If you want to exclude NULL values from your result set, you can use the IS NOT NULL condition before the IN operator. For example:\nSELECT * FROM table WHERE column IS NOT NULL AND column IN (value1, value2, value3);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EInclude NULL values\u003C\u002Fstrong\u003E: If you want to include NULL values in your result set, you can explicitly include NULL in the list of values used in the IN operator. For example:\nSELECT * FROM table WHERE column IN (value1, value2, value3, NULL);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse IS NULL condition\u003C\u002Fstrong\u003E: If you want to specifically check for NULL values in a column without using the IN operator, you can use the IS NULL condition. For example:\nSELECT * FROM table WHERE column IS NULL;\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIt's important to note that the behavior of the IN operator with NULL values may vary depending on the version of MySQL you are using. Therefore, it's recommended to test and validate the results when dealing with NULL values and the IN operator.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to update NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003ETo update NULL values in MySQL, you can use the UPDATE statement along with the IS NULL condition.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere is an example:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E3\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EUPDATE your_table\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ESET column_name = new_value\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EWHERE column_name IS NULL;\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn the above query, \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E is the name of the table you want to update, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E is the name of the specific column that contains the NULL values, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E is the value you want to update the NULL values with.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EMake sure to replace \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E with the appropriate values specific to your database.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values while performing joins in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen performing joins in MySQL, there are a few ways to handle NULL values:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EINNER JOIN\u003C\u002Fstrong\u003E: By default, the INNER JOIN only returns rows where there is a match in both tables. Therefore, NULL values are automatically excluded from the result set. No additional handling is required.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ELEFT JOIN or RIGHT JOIN\u003C\u002Fstrong\u003E: These join types return all the rows from one table (left or right) and the matching rows from the other table. If there is no match, NULL values are used for the columns of the other table. To handle NULL values in these types of joins, you can use functions like ISNULL(), COALESCE(), or IFNULL() to replace the NULL values with a specific value or perform some other calculation.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EExample:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E3\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ESELECT t1.column1, t2.column2\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EFROM table1 t1\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ELEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, if there is no match in table2 for a row in table1, t2.column2 will be NULL. You can handle this using the COALESCE() function to display a different value instead of NULL:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E3\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ESELECT t1.column1, COALESCE(t2.column2, 'N\u002FA') AS column2\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EFROM table1 t1\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ELEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere, if t2.column2 is NULL, 'N\u002FA' will be displayed instead.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECROSS JOIN\u003C\u002Fstrong\u003E: CROSS JOIN is used to produce Cartesian products, resulting in every combination of rows from both tables. Since NULL is not excluded in any way, no special handling is needed.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIt's important to note that handling NULL values in joins depends on your specific requirements and the context of your data. Be cautious when using functions like ISNULL(), COALESCE(), or IFNULL() as they can impact the performance of your query.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EWhat is the impact of NULL values on the UNION operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe UNION operator in MySQL combines the result sets of two or more SELECT statements into a single result set. When handling NULL values, the impact on the UNION operator is as follows:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the first SELECT statement\u003C\u002Fstrong\u003E: If a row in the first SELECT statement contains NULL values in the corresponding columns of the second SELECT statement, those rows will be included in the merged result set. However, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the second SELECT statement\u003C\u002Fstrong\u003E: If a row in the second SELECT statement contains NULL values in the corresponding columns of the first SELECT statement, those rows will be included in the merged result set. However, if a row in the second SELECT statement has NULL values in the corresponding columns of the first SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUNION ALL and NULL values\u003C\u002Fstrong\u003E: If the UNION operator is modified with UNION ALL, which retains duplicate rows, NULL values will be considered as distinct values. Therefore, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, and the second SELECT statement also contains rows with NULL values in those columns, both the rows will be included in the merged result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn summary, when using the UNION operator, NULL values can impact whether certain rows are included in the merged result set depending on how they are matched between the SELECT statements, and their treatment may vary based on whether UNION or UNION ALL is used.\u003C\u002Fp\u003E",formatted_content_ad:"\u003Cp\u003ENULL values in MySQL refer to the absence of a value in a field. They can occur when you insert or \u003Ca href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-update-records-in-a-mysql-table\"\u003Eupdate\u003C\u002Fa\u003E a record without specifying a value for that field, or when a certain field does not have any meaningful data to be stored.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ETo handle NULL values in MySQL, you can:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for NULL values using the IS NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE \u003Ca href=\"https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-get-the-not-null-column-name-in-a-mysql\"\u003Ecolumn_name IS NULL\u003C\u002Fa\u003E;\nThis query will return all records where the specified column has a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ECheck for non-NULL values using the IS NOT NULL operator\u003C\u002Fstrong\u003E:\nSELECT * FROM table_name WHERE column_name IS NOT NULL;\nThis query will return all records where the specified column does not have a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EHandle NULL values in calculations or expressions using the IFNULL() function\u003C\u002Fstrong\u003E:\nSELECT column_name, IFNULL(column_name, 'default_value') FROM table_name;\nThe IFNULL() function allows you to specify a default value that will be used in case the column contains a NULL value.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EAssign a default value to a column when creating a table\u003C\u002Fstrong\u003E:\nCREATE TABLE table_name (\ncolumn_name data_type DEFAULT default_value\n);\nBy providing a default value when creating a table, you ensure that the column will always have a value, even if it is not explicitly defined during insertion.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse the COALESCE() function to handle NULL values and select the first non-NULL value from a list of expressions\u003C\u002Fstrong\u003E:\nSELECT column_name, COALESCE(column1, column2, 'default_value') FROM table_name;\nThe COALESCE() function returns the first non-NULL value from the list of expressions. If all expressions are NULL, it will return the specified default value.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBy understanding how NULL values work in MySQL and utilizing these techniques, you can effectively handle and manage NULL values in your database operations.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Managed Hosting Providers in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fvultr.png\" alt=\"Vultr\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EVultr\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Ultra-fast Intel Core\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n High Performance and Cheap Cloud Dedicated Servers\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n 1 click install Wordpress\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Low Price and High Quality\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FTh8WHkbGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002Fdigital.png\" alt=\"Digital Ocean\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EDigital Ocean\u003C\u002Fp\u003E\n \n \n \u003Cul class=\"rating-benefits\"\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Active Digital Community\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Simple Control Panel\n \u003C\u002Fli\u003E\n \n \u003Cli class=\"rating-item\"\u003E\n \u003Ci class=\"mdi mdi-check-bold\" aria-hidden=\"true\"\u003E\u003C\u002Fi\u003E\n Starting from 5$ per month\n \u003C\u002Fli\u003E\n \n \u003C\u002Ful\u003E\n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FwbuWNkxGR\" target=\"_blank\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003ETry It Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to check if a value is NULL in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can use the IS NULL operator to check if a value is NULL. Here is an example query:\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003ESELECT * FROM table_name WHERE column_name IS NULL;\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Cp\u003EReplace "table_name" with the name of your table, and "column_name" with the name of the column you want to check for NULL values. The query will return all rows in which the specified column has a NULL value.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EWhat is the default behavior of NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe default behavior of NULL values in MySQL is to treat them as unknown or missing values. NULL is not the same as an empty string or zero; it represents the absence of a value. When performing calculations or comparisons involving NULL, the result will also be NULL. However, some functions and operators in MySQL may treat NULL values differently.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values in case statements in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EIn MySQL, you can handle NULL values in case statements using the COALESCE() function or by explicitly checking for NULL values.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EUsing COALESCE()\u003C\u002Fstrong\u003E:\nThe COALESCE() function allows you to return the first non-null value from a list. You can use it in a \u003Ca href=\"https:\u002F\u002Felvanco.com\u002Fblog\u002Fhow-to-use-case-when-in-another-case-when-condition\" target=\"_blank\"\u003Ecase statement\u003C\u002Fa\u003E to handle NULL values. Here's an example:\nSELECT col1, col2, COALESCE(col3, 'N\u002FA') AS col3\nFROM your_table;\nIn the above example, if col3 is NULL, it will be replaced with 'N\u002FA' in the result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EExplicitly checking for NULL\u003C\u002Fstrong\u003E:\nIf you want to perform specific operations or have different outputs for NULL values, you can explicitly check for NULL. Here's an example:\nSELECT col1,\nCASE\nWHEN col2 IS NULL THEN 'No value'\nELSE col2\nEND AS col2\nFROM your_table;\nIn the above example, if col2 is NULL, it will be replaced with 'No value' in the result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EBoth methods allow you to handle NULL values in case statements in MySQL. Choose the one that best fits your requirements.\u003C\u002Fp\u003E\n \u003Cdiv class=\"rating\"\u003E\n \u003Ch2\u003EBest MySQL Database Books to Read in 2024\u003C\u002Fh2\u003E\n \u003Cdiv class=\"row mt-2\"\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 1\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51duw5p-6fl-sl160.jpg\" alt=\"Murach's MySQL (3rd Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 5;\" aria-label=\"Rating is 5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's MySQL (3rd Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuh5bqW4Ig\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 2\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41m0q0rwm9l-sl160.jpg\" alt=\"Learning MySQL: Get a Handle on Your Data\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.9 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.9;\" aria-label=\"Rating is 4.9 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003ELearning MySQL: Get a Handle on Your Data\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fch5b3ZVIR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 3\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51wz-rn4dl-sl160.jpg\" alt=\"MySQL Crash Course: A Hands-on Introduction to Database Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.8 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.8;\" aria-label=\"Rating is 4.8 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Crash Course: A Hands-on Introduction to Database Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FSo5b3WVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 4\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F31f7dqnxj2l-sl160.jpg\" alt=\"PHP & MySQL: Server-side Web Development\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.7 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.7;\" aria-label=\"Rating is 4.7 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EPHP & MySQL: Server-side Web Development\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FU2cb3Z4IR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 5\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51zosxntq9l-sl160.jpg\" alt=\"MySQL Cookbook: Solutions for Database Developers and Administrators\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.6 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.6;\" aria-label=\"Rating is 4.6 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL Cookbook: Solutions for Database Developers and Administrators\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fx25xqZ4Sg\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 6\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F41i36vwllil-sl160.jpg\" alt=\"The MySQL Workshop: A practical guide to working with data and managing databases with MySQL\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.5 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.5;\" aria-label=\"Rating is 4.5 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EThe MySQL Workshop: A practical guide to working with data and managing databases with MySQL\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002Fuo5bqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 7\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51ebfs-hnil-sl160.jpg\" alt=\"Murach's PHP and MySQL (4th Edition)\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.4 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.4;\" aria-label=\"Rating is 4.4 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMurach's PHP and MySQL (4th Edition)\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FPAcxqZ4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 8\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51e5rrekjcl-sl160.jpg\" alt=\"High Performance MySQL: Proven Strategies for Operating at Scale\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.3 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.3;\" aria-label=\"Rating is 4.3 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EHigh Performance MySQL: Proven Strategies for Operating at Scale\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FBTcx3Z4SR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003Cdiv class=\"col-12\"\u003E\n \u003Cdiv class=\"v-card elevation-6\"\u003E\n \u003Cdiv class=\"v-card__text rating-text\"\u003E\n \u003Cdiv class=\"rating-counter\"\u003E\n \u003Cspan class=\"v-badge\"\u003E\n \u003Cspan class=\"v-badge__wrapper\"\u003E\n \u003Cspan aria-atomic=\"true\" aria-label=\"Позиция\" class=\"v-badge__badge primary\"\u003E\n 9\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fspan\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"row\"\u003E\n \u003Cdiv class=\"col-lg-3 col-md-4 col-sm-6 col-12 d-flex justify-center align-center\"\u003E\n \u003Cdiv\u003E\n \u003Cimg src=\"https:\u002F\u002Fblogweb-static.fra1.cdn.digitaloceanspaces.com\u002Fimages\u002F169cba5e-b8ab-45bd-a57d-4efbb973a779\u002Frating\u002F51j9jyeotkl-sl160.jpg\" alt=\"MySQL(TM): The Complete Reference\" \u002F\u003E\n \u003Cp class=\"text-center font-weight-bold text-h6\"\u003ERating is 4.2 out of 5\u003C\u002Fp\u003E\n \u003Cdiv class=\"stars\" style=\"--rating: 4.2;\" aria-label=\"Rating is 4.2 out of 5\" \u003E\u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003Cdiv class=\"col-lg-6 col-md-8 col-sm-6 col-12\"\u003E\n \u003Cp class=\"font-weight-bold rating-name\"\u003EMySQL(TM): The Complete Reference\u003C\u002Fp\u003E\n \n \n\n \n \n \u003C\u002Fdiv\u003E\n\n \u003Cdiv class=\"col-lg-3 col-md-12 col-12 d-flex align-center justify-lg-end justify-center\"\u003E\n \u003Cdiv class=\"text-center d-flex flex-column\"\u003E\n \n \u003Ca href=\"https:\u002F\u002Fgosrc.cc\u002Fgo\u002FJ05bqWVSR\" target=\"_blank\" rel=\"nofollow noopener\" class=\"v-btn v-btn--rounded elevation-5 v-size--large success mb-2\"\u003E\n \u003Cspan class=\"v-btn__content\"\u003EGet Book Now\u003C\u002Fspan\u003E\n \u003C\u002Fa\u003E\n \n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n \n \u003C\u002Fdiv\u003E\n \u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to handle NULL values when using the IN operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen using the IN operator in MySQL, you need to be aware of how it handles NULL values. Here are a few ways to handle NULL values when using the IN operator:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EExclude NULL values\u003C\u002Fstrong\u003E: If you want to exclude NULL values from your result set, you can use the IS NOT NULL condition before the IN operator. For example:\nSELECT * FROM table WHERE column IS NOT NULL AND column IN (value1, value2, value3);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EInclude NULL values\u003C\u002Fstrong\u003E: If you want to include NULL values in your result set, you can explicitly include NULL in the list of values used in the IN operator. For example:\nSELECT * FROM table WHERE column IN (value1, value2, value3, NULL);\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUse IS NULL condition\u003C\u002Fstrong\u003E: If you want to specifically check for NULL values in a column without using the IN operator, you can use the IS NULL condition. For example:\nSELECT * FROM table WHERE column IS NULL;\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Cp\u003EIt's important to note that the behavior of the IN operator with NULL values may vary depending on the version of MySQL you are using. Therefore, it's recommended to test and validate the results when dealing with NULL values and the IN operator.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Ch2\u003EHow to update NULL values in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003ETo update NULL values in MySQL, you can use the UPDATE statement along with the IS NULL condition.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere is an example:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E3\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EUPDATE your_table\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ESET column_name = new_value\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EWHERE column_name IS NULL;\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn the above query, \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E is the name of the table you want to update, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E is the name of the specific column that contains the NULL values, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E is the value you want to update the NULL values with.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EMake sure to replace \u003Ccode\u003Eyour_table\u003C\u002Fcode\u003E, \u003Ccode\u003Ecolumn_name\u003C\u002Fcode\u003E, and \u003Ccode\u003Enew_value\u003C\u002Fcode\u003E with the appropriate values specific to your database.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Ch2\u003EHow to handle NULL values while performing joins in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EWhen performing joins in MySQL, there are a few ways to handle NULL values:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003EINNER JOIN\u003C\u002Fstrong\u003E: By default, the INNER JOIN only returns rows where there is a match in both tables. Therefore, NULL values are automatically excluded from the result set. No additional handling is required.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ELEFT JOIN or RIGHT JOIN\u003C\u002Fstrong\u003E: These join types return all the rows from one table (left or right) and the matching rows from the other table. If there is no match, NULL values are used for the columns of the other table. To handle NULL values in these types of joins, you can use functions like ISNULL(), COALESCE(), or IFNULL() to replace the NULL values with a specific value or perform some other calculation.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EExample:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E3\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ESELECT t1.column1, t2.column2\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EFROM table1 t1\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ELEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn this example, if there is no match in table2 for a row in table1, t2.column2 will be NULL. You can handle this using the COALESCE() function to display a different value instead of NULL:\u003C\u002Fp\u003E\u003Cdiv style=\"color:#f8f8f2;background-color:#272822;\"\u003E\n\u003Ctable style=\"border-spacing:0;padding:0;margin:0;border:0;\"\u003E\u003Ctbody\u003E\u003Ctr\u003E\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E1\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E2\n\u003C\u002Fspan\u003E\u003Cspan style=\"white-space:pre;user-select:none;margin-right:0.4em;padding:0 0.4em 0 0.4em;color:#7f7f7f\"\u003E3\n\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\n\u003Ctd style=\"vertical-align:top;padding:0;margin:0;border:0;;width:100%\"\u003E\n\u003Cpre tabindex=\"0\" style=\"color:#f8f8f2;background-color:#272822;\"\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ESELECT t1.column1, COALESCE(t2.column2, 'N\u002FA') AS column2\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003EFROM table1 t1\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003Cspan style=\"display:flex;\"\u003E\u003Cspan\u003ELEFT JOIN table2 t2 ON t1.id = t2.id\n\u003C\u002Fspan\u003E\u003C\u002Fspan\u003E\u003C\u002Fpre\u003E\u003C\u002Ftd\u003E\u003C\u002Ftr\u003E\u003C\u002Ftbody\u003E\u003C\u002Ftable\u003E\n\u003C\u002Fdiv\u003E\n\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EHere, if t2.column2 is NULL, 'N\u002FA' will be displayed instead.\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ECROSS JOIN\u003C\u002Fstrong\u003E: CROSS JOIN is used to produce Cartesian products, resulting in every combination of rows from both tables. Since NULL is not excluded in any way, no special handling is needed.\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIt's important to note that handling NULL values in joins depends on your specific requirements and the context of your data. Be cautious when using functions like ISNULL(), COALESCE(), or IFNULL() as they can impact the performance of your query.\u003C\u002Fp\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cscript async=\"\" src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-4833888168110763\" data-ad-slot=\"7950772867\" data-ad-format=\"auto\" data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E\u003Ch2\u003EWhat is the impact of NULL values on the UNION operator in MySQL?\u003C\u002Fh2\u003E\u003Cp\u003EThe UNION operator in MySQL combines the result sets of two or more SELECT statements into a single result set. When handling NULL values, the impact on the UNION operator is as follows:\u003C\u002Fp\u003E\u003Col\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the first SELECT statement\u003C\u002Fstrong\u003E: If a row in the first SELECT statement contains NULL values in the corresponding columns of the second SELECT statement, those rows will be included in the merged result set. However, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003ERows with NULL values in the second SELECT statement\u003C\u002Fstrong\u003E: If a row in the second SELECT statement contains NULL values in the corresponding columns of the first SELECT statement, those rows will be included in the merged result set. However, if a row in the second SELECT statement has NULL values in the corresponding columns of the first SELECT statement, they will not be included in the merged result set.\n\u003C\u002Fli\u003E\u003Cli\u003E\u003Cstrong\u003EUNION ALL and NULL values\u003C\u002Fstrong\u003E: If the UNION operator is modified with UNION ALL, which retains duplicate rows, NULL values will be considered as distinct values. Therefore, if a row in the first SELECT statement has NULL values in the corresponding columns of the second SELECT statement, and the second SELECT statement also contains rows with NULL values in those columns, both the rows will be included in the merged result set.\n\u003C\u002Fli\u003E\u003C\u002Fol\u003E\u003Cp\u003E\u003Cbr\u002F\u003E\u003C\u002Fp\u003E\u003Cp\u003EIn summary, when using the UNION operator, NULL values can impact whether certain rows are included in the merged result set depending on how they are matched between the SELECT statements, and their treatment may vary based on whether UNION or UNION ALL is used.\u003C\u002Fp\u003E",slug:"how-to-handle-null-values-in-mysql",image:"blog\u002F165543ec-45b4-412f-9ad9-285e90b5cf48\u002F656955ab98ebd73aea02ed7a.png",active:d,nofollow_links:c,hash_tags:["blogweb"],allow_comments:c,no_ad:c,update_daily:c,update_monthly:c,update_yearly:d,meta_title:"How to Handle NULL Values In MySQL in 2024?",meta_description:aO,related_posts:[{id:ap,text:m,title:a,image:aq,summary:ar,slug:as},{id:at,text:au,title:a,image:av,summary:aw,slug:ax},{id:ay,text:az,title:a,image:aA,summary:aB,slug:aC},{id:97912,text:"Where to Find MySQL Usernames And Passwords?",title:a,image:"blog\u002F7da4edde-5970-476f-809f-afb90961a410\u002F6541e2f4fea49d2474962686.png",summary:"To find MySQL usernames and passwords, you can check the following locations:MySQL Configuration File: The usernames and passwords for MySQL are usually specified in the "my.cnf" or "my.ini" configuration file. This file can be found in different locations depending on the operating system. For example, on Linux, it is often located in the \u002Fetc\u002Fmysql\u002F directory.\nMySQL User Table: MySQL stores user account information in the user table of the "mysql" system database.",slug:"where-to-find-mysql-usernames-and-passwords"},{id:97831,text:"Where to Find the MySQL Config File?",title:a,image:"blog\u002Ffabd330e-b6ab-406b-8570-d0a909c03cc2\u002F65416f8d456303630adc4228.png",summary:"The MySQL config file contains important configuration settings for the MySQL database server. The location of the MySQL config file depends on the operating system you are using.On Unix-based systems (such as Linux and macOS), the MySQL config file is typically named "my.cnf" or "my.ini" and can be found in the following locations:\u002Fetc\u002Fmysql\u002F\u002Fetc\u002F\u002Fusr\u002Flocal\u002Fmysql\u002F\u002Fusr\u002Flocal\u002Fetc\u002FOn Windows systems, the MySQL config file is usually named "my.",slug:"where-to-find-the-mysql-config-file"},{id:118153,text:"How to Make Gap In Chart.js Graph?",title:a,image:"blog\u002F7e63d08e-8821-4700-b593-d92a6756f7b5\u002F65d2a0e44a2d87c760a1826c.png",summary:"To create a gap in a Chart.js graph, you can use the null value in your dataset. By setting a data point to null, Chart.js will automatically create a gap in the line or bar graph at that specific point. This can be useful for indicating missing or incomplete data in your graph. Simply replace the value at the desired data point with null in your dataset array, and Chart.js will handle the rest to display the gap in the graph.",slug:"how-to-make-gap-in-chart-js-graph"},{id:119378,text:"How to Declare an Empty Variable Inside Function In Php?",title:a,image:"blog\u002Fef78f2f8-6edd-4f8c-8136-422c8cfe7f3f\u002F65e48c0991c680d16761ff95.png",summary:"In PHP, you can declare an empty variable inside a function by simply assigning a null value to the variable. For example, you can declare an empty variable called $myVariable inside a function like this:function myFunction() {\n$myVariable = null;\n}By setting the variable to null, you are essentially declaring it as empty without assigning any specific value to it. You can then assign a value to this variable later in the function if needed.",slug:"how-to-declare-an-empty-variable-inside-function-in"},{id:97802,text:"Where Can I Find MySQL Database Files?",title:a,image:"blog\u002F9b5bd63f-eb2f-45da-b592-5f9b225ba01f\u002F65414625456303630adc41e1.png",summary:"MySQL database files can typically be found in the designated data directory of the MySQL installation. The location of the data directory may vary depending on the operating system and the method used for installation.On Unix-like systems, such as Linux, macOS, or BSD, you can often find the MySQL data directory at \u002Fvar\u002Flib\u002Fmysql. However, it can be different based on the specific distribution and configuration. In some cases, it may be located at \u002Fusr\u002Flocal\u002Fmysql\u002Fdata or \u002Fusr\u002Flocal\u002Fvar\u002Fmysql.",slug:"where-can-i-find-mysql-database-files"},{id:117568,text:"How to Import Csv to Mysql Using React.js?",title:a,image:"blog\u002F9ef4937c-6a19-4d55-8756-a0a068c50b29\u002F65cae6c6af8ff865ff3b3e10.png",summary:"To import a CSV file to MySQL using React.js, you can follow these steps:First, create a basic React component in your project.Install the required dependencies, such as react-csv-reader and mysql.Import the necessary packages in your component file.\nimport React from 'react';\nimport CSVReader from 'react-csv-reader';\nimport mysql from 'mysql';\nSet up a MySQL connection by creating a connection object.\nconst connection = mysql.",slug:"how-to-import-csv-to-mysql-using-react-js"},{id:106569,text:"How to Extract JSON From MySQL?",title:a,image:"blog\u002Fd22892b9-a027-4f15-93cb-470413b58726\u002F65652b72ca22e36eae727a38.png",summary:"Extracting JSON from MySQL involves using MySQL's JSON functions and operators to retrieve and parse JSON data stored in your database. Here are the steps to extract JSON from MySQL:Access the MySQL command-line or any MySQL administration tool.\nConnect to your MySQL database using appropriate credentials.\nUse the SELECT statement to retrieve the JSON data. 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Settings","Security Settings","Ratings","Author","Blog Content","Blog","Personal Messages","Admin dashboard","Moderator dashboard","Contact us","Read more at:",80,"Guides","\u003Cscript async src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E\n\u003C!-- wpcrux --\u003E\n\u003Cins class=\"adsbygoogle\"\n style=\"display:block\"\n data-ad-client=\"ca-pub-4833888168110763\"\n data-ad-slot=\"7950772867\"\n data-ad-format=\"auto\"\n data-full-width-responsive=\"true\"\u003E\u003C\u002Fins\u003E\n\u003Cscript\u003E\n (adsbygoogle = window.adsbygoogle || []).push({});\n\u003C\u002Fscript\u003E",6,"Home","\u002F","Category","Hash Tags","Forum","Redirect","Auto Linker Settings","Keywords List","Community Forum","Edit User Details","View Message","My Profile","Description","Picture","Price","Question","Sign Up","default","https:\u002F\u002Fwpcrux.com\u002Fblog\u002Fhow-to-handle-null-values-in-mysql",117983,"blog\u002F22dc5ab1-e285-48c2-966f-915e35683229\u002F65cfff50c4cbf13a9ca08f61.png","NULL values in MySQL represent the absence of data or an unknown value. Handling NULL values requires special consideration as they differ from regular values. Here are some strategies for handling NULL values in MySQL:Identification: To check for NULL values in a column, you can use the IS NULL or IS NOT NULL operator.","how-to-handle-null-values-in-mysql-1",117194,"How to Properly Assign Null Value From Bash Script to Mysql?","blog\u002F2b607d89-f337-4bd2-a6f7-6f350c3f0d59\u002F65c793fa5484f57c6301cf82.png","To properly assign a null value from a bash script to MySQL, you can use the following steps:Connect to the MySQL database from your bash script using the mysql command-line client. You may need to provide the appropriate authentication credentials such as username and password.\nPrepare the SQL statement that includes the column where you want to assign the null value.","how-to-properly-assign-null-value-from-bash-script",106448,"How to Get the \"Not Null Column Name\" In A MySQL Database?","blog\u002Fd9904e7f-ec17-4185-b143-044f5c7b2064\u002F656480ddca22e36eae6dcfd4.png","To get the name of a "not null" column in a MySQL database, you can use the information_schema database. The information_schema database is a MySQL database that stores metadata about other databases, tables, columns, etc.You can execute the following query to retrieve the column name in the table that has the "not null" constraint:\nSELECT COLUMN_NAME\nFROM INFORMATION_SCHEMA.","how-to-get-the-not-null-column-name-in-a-mysql",3,1360,"guides","169cba5e-b8ab-45bd-a57d-4efbb973a779","wpcrux.com","logo\u002F99cc33.png","en","User-agent: *\nDisallow: \u002Fsearch\nDisallow: \u002Fadmin\nDisallow: \u002Fprofile\nDisallow: \u002Flogin\nDisallow: \u002Fregister\n\nSitemap: https:\u002F\u002Fwpcrux.com\u002Fsitemap.xml","\u003C!-- Yandex.Metrika counter --\u003E\n\u003Cscript type=\"text\u002Fjavascript\" \u003E\n (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};\n m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})\n (window, document, \"script\", \"https:\u002F\u002Fmc.yandex.ru\u002Fmetrika\u002Ftag.js\", \"ym\");\n\n ym(70412614, \"init\", {\n clickmap:true,\n trackLinks:true,\n accurateTrackBounce:true\n });\n\u003C\u002Fscript\u003E\n\u003Cnoscript\u003E\u003Cdiv\u003E\u003Cimg src=\"https:\u002F\u002Fmc.yandex.ru\u002Fwatch\u002F70412614\" style=\"position:absolute; left:-9999px;\" alt=\"\" \u002F\u003E\u003C\u002Fdiv\u003E\u003C\u002Fnoscript\u003E\n\u003C!-- \u002FYandex.Metrika counter --\u003E\n\n\u003Cscript data-ad-client=\"ca-pub-4833888168110763\" async src=\"https:\u002F\u002Fpagead2.googlesyndication.com\u002Fpagead\u002Fjs\u002Fadsbygoogle.js\"\u003E\u003C\u002Fscript\u003E","email","2020-12-10T08:26:01Z","Learn how to effectively handle NULL values in MySQL with expert tips and techniques.","forum","Bottom","Top",12,"\u003Cp\u003EHow to create images in python tkinter?\u003C\u002Fp\u003E","\u003Cp\u003EHow to return word under cursor in tkinter?\u003C\u002Fp\u003E","\u003Cp\u003EHow to update a histogram in tkinter?\u003C\u002Fp\u003E","\u003Cp\u003EHow to change text cursor color in tkinter?\u003C\u002Fp\u003E","\u003Cp\u003EHow to update image in tkinter label?\u003C\u002Fp\u003E","Posted Links","Table of Contents","Trusted User","Active","Topics","General Settings","Moderate Threads","Authors","Members","Ask AI","Are you sure you want to delete this category?","Created","Your account was successfully confirmed","Forum Category Settings","List Users","Moderate Thread","New User","Model","Forum Settings","Role","Api Key","Query:","Edit Profile","Image","Title","Username","Update","New Ad","Ban","Export Data","Edit Category","New Category","Add a new menu link","My profile"));</script><script src="https://pub-420acf56315e422bbbdab07717bee8cd.r2.dev/assets/0.1/50d1395.js" defer></script><script src="https://pub-420acf56315e422bbbdab07717bee8cd.r2.dev/assets/0.1/498f8f7.js" defer></script><script src="https://pub-420acf56315e422bbbdab07717bee8cd.r2.dev/assets/0.1/fffc2dc.js" defer></script><script src="https://pub-420acf56315e422bbbdab07717bee8cd.r2.dev/assets/0.1/25d50b7.js" defer></script>
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