{"id":2113,"date":"2013-05-07T00:41:43","date_gmt":"2013-05-07T08:41:43","guid":{"rendered":"http:\/\/www.mysqltutorial.org\/?page_id=2113"},"modified":"2023-12-30T07:10:15","modified_gmt":"2023-12-30T14:10:15","slug":"mysql-delete-join","status":"publish","type":"page","link":"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-delete-join\/","title":{"rendered":"MySQL DELETE JOIN"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, we will show you how to delete data from multiple tables by using <strong>MySQL&nbsp;DELETE&nbsp;JOIN&nbsp;<\/strong>statement.<\/p>\n\n\n\n<p>In the previous tutorial, you learned how to delete rows of multiple tables by using:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><span style=\"line-height: 13px;\">A single <code><a href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-delete\/\">DELETE<\/a><\/code> statement on multiple tables.<\/span><\/li>\n\n\n\n<li>A single <code>DELETE<\/code> statement on multiple related tables which the child table has an\u00a0<code><a href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-on-delete-cascade\/\">ON DELETE CASCADE<\/a><\/code> referential action for the <a href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-foreign-key\/\">foreign key<\/a>.<\/li>\n<\/ul>\n\n\n\n<p>This tutorial introduces to you a more flexible way to delete data from multiple tables using <a href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-inner-join\/\"><code>INNER JOIN<\/code><\/a> or <a href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-left-join\/\"><code>LEFT JOIN<\/code><\/a> clause with the <code>DELETE<\/code> statement.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MySQL DELETE JOIN with INNER JOIN<\/h2>\n\n\n\n<p>MySQL allows you to use the <code>INNER JOIN<\/code> clause in the <code>DELETE<\/code> statement to delete rows from one table that has matching rows in another table.<\/p>\n\n\n\n<p>For example, to delete rows from both <code>T1<\/code> and <code>T2<\/code> tables that meet a specified condition, you use the following statement:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DELETE<\/span> T1, T2\n<span class=\"hljs-keyword\">FROM<\/span> T1\n<span class=\"hljs-keyword\">INNER<\/span> <span class=\"hljs-keyword\">JOIN<\/span> T2 <span class=\"hljs-keyword\">ON<\/span> T1.key = T2.key\n<span class=\"hljs-keyword\">WHERE<\/span> condition;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Notice that you place table names <code>T1<\/code> and <code>T2<\/code> between\u00a0the\u00a0<code>DELETE<\/code> and <code>FROM<\/code>\u00a0keywords. If you omit <code>T1<\/code> table, the <code>DELETE<\/code> statement only deletes rows in\u00a0<code>T2<\/code> table.\u00a0Similarly, if you omit <code>T2<\/code> table, the <code>DELETE<\/code> statement will delete only rows in\u00a0<code>T1<\/code> table.<\/p>\n\n\n\n<p>The expression <code>T1.key = T2.key<\/code> specifies&nbsp;the condition for matching rows between <code>T1<\/code> and<code>T2<\/code> tables that will be deleted.<\/p>\n\n\n\n<p>The condition of the\u00a0\u00a0<code>WHERE<\/code> clause determines rows in the <code>T1<\/code> and <code>T2<\/code> that will be deleted.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">MySQL DELETE JOIN with INNER JOIN example<\/h3>\n\n\n\n<p>Suppose, we have two tables <code>t1<\/code> and <code>t2<\/code> with the following structures and data:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DROP<\/span> <span class=\"hljs-keyword\">TABLE<\/span> <span class=\"hljs-keyword\">IF<\/span> <span class=\"hljs-keyword\">EXISTS<\/span> t1, t2;\n\n<span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> t1 (\n    <span class=\"hljs-keyword\">id<\/span> <span class=\"hljs-built_in\">INT<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span> AUTO_INCREMENT\n);\n\n<span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> t2 (\n    <span class=\"hljs-keyword\">id<\/span> <span class=\"hljs-built_in\">VARCHAR<\/span>(<span class=\"hljs-number\">20<\/span>) PRIMARY <span class=\"hljs-keyword\">KEY<\/span>,\n    <span class=\"hljs-keyword\">ref<\/span> <span class=\"hljs-built_in\">INT<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span>\n);\n\n<span class=\"hljs-keyword\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span> t1 <span class=\"hljs-keyword\">VALUES<\/span> (<span class=\"hljs-number\">1<\/span>),(<span class=\"hljs-number\">2<\/span>),(<span class=\"hljs-number\">3<\/span>);\n\n<span class=\"hljs-keyword\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span> t2(<span class=\"hljs-keyword\">id<\/span>,<span class=\"hljs-keyword\">ref<\/span>) <span class=\"hljs-keyword\">VALUES<\/span>(<span class=\"hljs-string\">'A'<\/span>,<span class=\"hljs-number\">1<\/span>),(<span class=\"hljs-string\">'B'<\/span>,<span class=\"hljs-number\">2<\/span>),(<span class=\"hljs-string\">'C'<\/span>,<span class=\"hljs-number\">3<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"361\" height=\"363\" src=\"https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2013\/05\/MySQL-DELETE-JOIN.png\" alt=\"MySQL DELETE JOIN\" class=\"wp-image-6408\" title=\"MySQL DELETE JOIN\" srcset=\"https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2013\/05\/MySQL-DELETE-JOIN.png 361w, https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2013\/05\/MySQL-DELETE-JOIN-200x200.png 200w, https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2013\/05\/MySQL-DELETE-JOIN-298x300.png 298w\" sizes=\"auto, (max-width: 361px) 100vw, 361px\" \/><\/figure>\n\n\n\n<p>The following statement deletes the row with id 1 in the <code>t1<\/code> table and also row with <code>ref<\/code> 1 in the <code>t2<\/code> table using <code>DELETE...INNER JOIN<\/code> statement:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DELETE<\/span> t1,t2 <span class=\"hljs-keyword\">FROM<\/span> t1\n        <span class=\"hljs-keyword\">INNER<\/span> <span class=\"hljs-keyword\">JOIN<\/span>\n    t2 <span class=\"hljs-keyword\">ON<\/span> t2.ref = t1.id \n<span class=\"hljs-keyword\">WHERE<\/span>\n    t1.id = <span class=\"hljs-number\">1<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The statement returned the following message:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">2 row(s) affected<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>It indicated that two rows had been deleted.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MySQL DELETE JOIN with LEFT JOIN<\/h2>\n\n\n\n<p>We often use the&nbsp;<code><a href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-left-join\/\">LEFT JOIN<\/a><\/code> clause in the <code>SELECT<\/code> statement to find rows in the left table that have or don&#8217;t have matching rows in the right table.<\/p>\n\n\n\n<p>We can also use the <code>LEFT JOIN<\/code> clause in the <code>DELETE<\/code> statement to delete rows in a table (left table) that does not have matching rows in another table (right table).<\/p>\n\n\n\n<p>The following syntax illustrates how to use <code>DELETE<\/code> statement with <code>LEFT JOIN<\/code> clause to delete rows from <code>T1<\/code> table that does not have corresponding rows in the <code>T2<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DELETE<\/span> T1 \n<span class=\"hljs-keyword\">FROM<\/span> T1\n        <span class=\"hljs-keyword\">LEFT<\/span> <span class=\"hljs-keyword\">JOIN<\/span>\n    T2 <span class=\"hljs-keyword\">ON<\/span> T1.key = T2.key \n<span class=\"hljs-keyword\">WHERE<\/span>\n    T2.key <span class=\"hljs-keyword\">IS<\/span> <span class=\"hljs-literal\">NULL<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Note that we only put <code>T1<\/code> table after the <code>DELETE<\/code> keyword, not both <code>T1<\/code> and <code>T2<\/code> tables like we did with the&nbsp;<code>INNER JOIN<\/code> clause.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">MySQL DELETE JOIN with LEFT JOIN example<\/h3>\n\n\n\n<p>See the following <code>customers<\/code> and <code>orders<\/code> tables in the sample database:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"481\" height=\"319\" src=\"https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2009\/12\/customers_orders_tables.png\" alt=\"Customers and Orders Tables\" class=\"wp-image-739\" title=\"Customers and Orders Tables\" srcset=\"https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2009\/12\/customers_orders_tables.png 481w, https:\/\/www.mysqltutorial.org\/wp-content\/uploads\/2009\/12\/customers_orders_tables-300x199.png 300w\" sizes=\"auto, (max-width: 481px) 100vw, 481px\" \/><\/figure>\n\n\n\n<p>Each customer has zero or more orders. However, each order belongs to one and only one customer.<\/p>\n\n\n\n<p>We can use <code>DELETE<\/code> statement with <code>LEFT JOIN<\/code> clause to clean up our customer master data. The following statement removes customers who have not placed any orders:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">DELETE<\/span> customers \n<span class=\"hljs-keyword\">FROM<\/span> customers\n        <span class=\"hljs-keyword\">LEFT<\/span> <span class=\"hljs-keyword\">JOIN<\/span>\n    orders <span class=\"hljs-keyword\">ON<\/span> customers.customerNumber = orders.customerNumber \n<span class=\"hljs-keyword\">WHERE<\/span>\n    orderNumber <span class=\"hljs-keyword\">IS<\/span> <span class=\"hljs-literal\">NULL<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>We can verify the deletion by finding whether customers who do not have any orders exist using the following query:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">SELECT<\/span> \n    c.customerNumber, \n    c.customerName, \n    orderNumber\n<span class=\"hljs-keyword\">FROM<\/span>\n    customers c\n        <span class=\"hljs-keyword\">LEFT<\/span> <span class=\"hljs-keyword\">JOIN<\/span>\n    orders o <span class=\"hljs-keyword\">ON<\/span> c.customerNumber = o.customerNumber\n<span class=\"hljs-keyword\">WHERE<\/span>\n    orderNumber <span class=\"hljs-keyword\">IS<\/span> <span class=\"hljs-literal\">NULL<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">SQL (Structured Query Language)<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">sql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The query returned an empty result set which is what we expected.<\/p>\n\n\n\n<p>In this tutorial, you have learned how to use the MySQL&nbsp;<code>DELETE JOIN<\/code>&nbsp;statement to delete data from two or more tables.<\/p>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div class=\"wth-question\">Was this tutorial helpful? <\/div>\n\t\t<div class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"2113\"\n\t\t\t\tdata-post-url=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-delete-join\/\"\n\t\t\t\tdata-post-title=\"MySQL DELETE JOIN\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded 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JOIN.<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":174,"menu_order":63,"comment_status":"closed","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-2113","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>MySQL DELETE JOIN: Deleting Data from Multiple Tables<\/title>\n<meta name=\"description\" content=\"This tutorial shows you how to delete data from multiple tables by using MySQL DELETE JOIN statement with INNER JOIN and LEFT JOIN.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-delete-join\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MySQL 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