{"id":1791,"date":"2019-04-21T11:39:14","date_gmt":"2019-04-21T04:39:14","guid":{"rendered":"http:\/\/www.sqlservertutorial.net\/?page_id=1791"},"modified":"2020-04-11T20:12:22","modified_gmt":"2020-04-11T13:12:22","slug":"sql-server-drop-index","status":"publish","type":"page","link":"https:\/\/www.sqlservertutorial.net\/sql-server-indexes\/sql-server-drop-index\/","title":{"rendered":"SQL Server DROP INDEX"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the SQL Server <code>DROP INDEX<\/code> statement to remove existing indexes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='sql-server-drop-index-statement-overview'>SQL Server DROP INDEX statement overview <a href=\"#sql-server-drop-index-statement-overview\" class=\"anchor\" id=\"sql-server-drop-index-statement-overview\" title=\"Anchor for SQL Server DROP INDEX statement overview\">#<\/a><\/h2>\n\n\n\n<p>The <code>DROP INDEX<\/code> statement removes one or more indexes from the current database. Here is the syntax of the <code>DROP INDEX<\/code> 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\">DROP<\/span> <span class=\"hljs-keyword\">INDEX<\/span> &#91;<span class=\"hljs-keyword\">IF<\/span> <span class=\"hljs-keyword\">EXISTS<\/span>] index_name\n<span class=\"hljs-keyword\">ON<\/span> table_name;\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>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>First, specify the name of the index that you want to remove after the <code>DROP INDEX<\/code> clause.<\/li><li>Second, specify the name of the table to which the index belongs.<\/li><\/ul>\n\n\n\n<p>Removing a nonexisting index will result in an error. However, you can use the <code>IF EXISTS<\/code> option to conditionally drop the index and avoid the error.<\/p>\n\n\n\n<p>Note that the <code>IF EXISTS<\/code> option has been available since SQL Server 2016 (13.x).<\/p>\n\n\n\n<p>The <code>DROP INDEX<\/code> statement does not remove indexes created by <code><a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-primary-key\/\">PRIMARY KEY<\/a><\/code> or <code><a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-unique-constraint\/\">UNIQUE<\/a><\/code> constraints. To drop indexes associated with these constraints, you use the <code>ALTER TABLE DROP CONSTRAINT<\/code> statement.<\/p>\n\n\n\n<p>To remove multiple indexes from one or more tables at the same time, you specify a comma-separated list of index names with the corresponding table names after the <code>DROP INDEX<\/code> clause as shown in 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\">DROP<\/span> <span class=\"hljs-keyword\">INDEX<\/span> &#91;<span class=\"hljs-keyword\">IF<\/span> <span class=\"hljs-keyword\">EXISTS<\/span>] \n    index_name1 <span class=\"hljs-keyword\">ON<\/span> table_name1,\n    index_name2 <span class=\"hljs-keyword\">ON<\/span> table_name2,\n    ...;\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<h2 class=\"wp-block-heading\" id='sql-server-drop-index-statement-examples'>SQL Server DROP INDEX statement examples <a href=\"#sql-server-drop-index-statement-examples\" class=\"anchor\" id=\"sql-server-drop-index-statement-examples\" title=\"Anchor for SQL Server &lt;code&gt;DROP INDEX&lt;\/code&gt; statement examples\">#<\/a><\/h2>\n\n\n\n<p>We will use the <code>sales.customers<\/code> table from the <a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-sample-database\/\">sample database<\/a> for the demonstration.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"181\" height=\"231\" src=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/customers.png\" alt=\"customers\" class=\"wp-image-158\"\/><\/figure>\n\n\n\n<p>The following picture shows the indexes of the <code>sales.customers<\/code> table:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"352\" height=\"199\" src=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-example-table.png\" alt=\"\" class=\"wp-image-1792\" srcset=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-example-table.png 352w, https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-example-table-300x170.png 300w\" sizes=\"auto, (max-width: 352px) 100vw, 352px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id='a-using-sql-server-drop-index-to-remove-one-index-example'>A) Using SQL Server DROP INDEX to remove one index example <a href=\"#a-using-sql-server-drop-index-to-remove-one-index-example\" class=\"anchor\" id=\"a-using-sql-server-drop-index-to-remove-one-index-example\" title=\"Anchor for A) Using SQL Server &lt;code&gt;DROP INDEX&lt;\/code&gt; to remove one index example\">#<\/a><\/h3>\n\n\n\n<p>This statement uses the <code>DROP INDEX<\/code> statement to remove the <code>ix_cust_email<\/code> index from the sales.customers table:<\/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\">DROP<\/span> <span class=\"hljs-keyword\">INDEX<\/span> <span class=\"hljs-keyword\">IF<\/span> <span class=\"hljs-keyword\">EXISTS<\/span> ix_cust_email\n<span class=\"hljs-keyword\">ON<\/span> sales.customers;\n<\/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>If you check the indexes of the <code>sales.customers<\/code> table, you will see that the <code>ix_cust_email<\/code> index was deleted.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"334\" height=\"179\" src=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-one-index-example.png\" alt=\"SQL Server DROP INDEX one index example\" class=\"wp-image-1794\" srcset=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-one-index-example.png 334w, https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-one-index-example-300x161.png 300w\" sizes=\"auto, (max-width: 334px) 100vw, 334px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id='busing-sql-server-drop-index-to-remove-multiple-indexes-example'>B)Using SQL Server DROP INDEX to remove multiple indexes example <a href=\"#busing-sql-server-drop-index-to-remove-multiple-indexes-example\" class=\"anchor\" id=\"busing-sql-server-drop-index-to-remove-multiple-indexes-example\" title=\"Anchor for B)Using SQL Server &lt;code&gt;DROP INDEX&lt;\/code&gt; to remove multiple indexes example\">#<\/a><\/h3>\n\n\n\n<p>The following example uses the DROP INDEX statement to remove the <code>ix_cust_city<\/code>, <code>ix_cust_fullname<\/code> indexes from the <code>sales.customers<\/code> table:<\/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\"><span class=\"hljs-keyword\">DROP<\/span> <span class=\"hljs-keyword\">INDEX<\/span> \n    ix_cust_city <span class=\"hljs-keyword\">ON<\/span> sales.customers,\n    ix_cust_fullname <span class=\"hljs-keyword\">ON<\/span> sales.customers;\n<\/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>The <code>sales.customers<\/code> table now has no non-clustered index:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"347\" height=\"139\" src=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-multiple-indexes-example.png\" alt=\"SQL Server DROP INDEX multiple indexes example\" class=\"wp-image-1793\" srcset=\"https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-multiple-indexes-example.png 347w, https:\/\/www.sqlservertutorial.net\/wp-content\/uploads\/SQL-Server-DROP-INDEX-multiple-indexes-example-300x120.png 300w\" sizes=\"auto, (max-width: 347px) 100vw, 347px\" \/><\/figure>\n\n\n\n<p>In this tutorial, you have learned how to use the SQL Server <code>DROP INDEX<\/code> statement to remove one or many indexes from 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=\"1791\"\n\t\t\t\tdata-post-url=\"https:\/\/www.sqlservertutorial.net\/sql-server-indexes\/sql-server-drop-index\/\"\n\t\t\t\tdata-post-title=\"SQL Server DROP INDEX\"\n\t\t\t\tdata-response=\"1\"\n\t\t\t\tclass=\"wth-btn-rounded wth-yes-btn\"\n\t\t\t>\n\t\t\t\t<svg\n\t\t\t\t\txmlns=\"http:\/\/www.w3.org\/2000\/svg\"\n\t\t\t\t\tviewBox=\"0 0 24 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