{"id":359,"date":"2018-05-01T22:14:58","date_gmt":"2018-05-01T15:14:58","guid":{"rendered":"http:\/\/www.sqlservertutorial.net\/?page_id=359"},"modified":"2020-04-11T20:13:32","modified_gmt":"2020-04-11T13:13:32","slug":"sql-server-intersect","status":"publish","type":"page","link":"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-intersect\/","title":{"rendered":"SQL Server INTERSECT"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the SQL Server <code>INTERSECT<\/code>&nbsp;operator to combine result sets of two input queries and return the distinct rows that appear in both inputs.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-sql-server-intersect'>Introduction to SQL Server INTERSECT <a href=\"#introduction-to-sql-server-intersect\" class=\"anchor\" id=\"introduction-to-sql-server-intersect\" title=\"Anchor for Introduction to SQL Server &lt;code&gt;INTERSECT&lt;\/code&gt;\">#<\/a><\/h2>\n\n\n\n<p>The SQL Server <code>INTERSECT<\/code> combines result sets of two or more queries and returns distinct rows that are output by both queries.<\/p>\n\n\n\n<p>The following illustrates the syntax of the SQL Server <code>INTERSECT<\/code>:<\/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\">query_1\nINTERSECT\nquery_2\n<\/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>Similar to the <code><a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-union\/\">UNION<\/a><\/code>&nbsp;operator, the queries in the syntax above must conform to&nbsp;the following rules:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Both queries must have the same number and order of columns.<\/li><li>The data type of the corresponding columns must be the same or compatible.<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"583\" height=\"164\" src=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-INTERSECT-Illustration.png\" alt=\"SQL Server INTERSECT Illustration\" class=\"wp-image-361\" srcset=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-INTERSECT-Illustration.png 583w, https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-INTERSECT-Illustration-300x84.png 300w\" sizes=\"auto, (max-width: 583px) 100vw, 583px\" \/><\/figure>\n\n\n\n<p>The following picture illustrates the <code>INTERSECT<\/code> operation:<\/p>\n\n\n\n<p>In this illustration, we had two result sets T1 and T2:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>T1 result set includes 1, 2, and 3.<\/li><li>T2 result set includes 2, 3, and 4.<\/li><\/ul>\n\n\n\n<p>The intersection of T1 and T2 result sets returns the distinct rows which are 2 and 3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='sql-server-intersect-example'>SQL Server INTERSECT example <a href=\"#sql-server-intersect-example\" class=\"anchor\" id=\"sql-server-intersect-example\" title=\"Anchor for SQL Server &lt;code&gt;INTERSECT&lt;\/code&gt; example\">#<\/a><\/h2>\n\n\n\n<p>Consider the following query:<\/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\">SELECT<\/span>\n    city\n<span class=\"hljs-keyword\">FROM<\/span>\n    sales.customers\n<span class=\"hljs-keyword\">INTERSECT<\/span>\n<span class=\"hljs-keyword\">SELECT<\/span>\n    city\n<span class=\"hljs-keyword\">FROM<\/span>\n    sales.stores\n<span class=\"hljs-keyword\">ORDER<\/span> <span class=\"hljs-keyword\">BY<\/span>\n    city;\n<\/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=\"81\" height=\"74\" src=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-INTERSECT-example.png\" alt=\"SQL Server INTERSECT example\" class=\"wp-image-362\"\/><\/figure>\n\n\n\n<p>The first query finds all cities of the customers and the second query finds the cities of the stores. The whole query, which uses <code>INTERSECT<\/code>, returns the common cities of customers and stores, which are the cities output by both input queries.<\/p>\n\n\n\n<p>Notice that we added the <code><a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-order-by\/\">ORDER BY<\/a><\/code> clause to the last query to sort the result set.<\/p>\n\n\n\n<p>In this tutorial, you have learned how to use the SQL Server <code>INTERSECT<\/code>&nbsp; operator to return the intersection of the result sets of two queries.<\/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=\"359\"\n\t\t\t\tdata-post-url=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-intersect\/\"\n\t\t\t\tdata-post-title=\"SQL Server INTERSECT\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded 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and return the distinct rows that appear in both inputs.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":100,"menu_order":31,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-359","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>SQL Server INTERSECT Explained By Practical Examples<\/title>\n<meta name=\"description\" content=\"In this tutorial, you will learn how to use the SQL Server INTERSECT to combine result sets of two input queries and return the distinct rows that appear in both inputs.\" \/>\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.sqlservertutorial.net\/sql-server-basics\/sql-server-intersect\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" 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