{"id":978,"date":"2016-07-18T08:11:24","date_gmt":"2016-07-18T08:11:24","guid":{"rendered":"https:\/\/sqltutorial.org\/?page_id=978"},"modified":"2025-02-04T06:42:20","modified_gmt":"2025-02-04T13:42:20","slug":"sql-trim","status":"publish","type":"page","link":"https:\/\/www.sqltutorial.org\/sql-string-functions\/sql-trim\/","title":{"rendered":"SQL TRIM Function"},"content":{"rendered":"\n<p><strong>&nbsp;Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the SQL <code>TRIM<\/code> function to remove specified characters from the start and the end of a string.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-sql-trim-function'>Introduction to SQL TRIM function <a href=\"#introduction-to-sql-trim-function\" class=\"anchor\" id=\"introduction-to-sql-trim-function\" title=\"Anchor for Introduction to SQL TRIM function\">#<\/a><\/h2>\n\n\n\n<p>In SQL, the <code>TRIM<\/code> function allows you to remove specified characters from the start and end of a string.<\/p>\n\n\n\n<p>Here&#8217;s the syntax of the <code>TRIM<\/code> function:<\/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\">TRIM(&#91;LEADING | TRAILING | BOTH] characters FROM string);<\/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\">\n<li><code>characters<\/code> are the characters you want to remove from the input string. If you do not specify <code>characters<\/code>, the <code>TRIM()<\/code> function will remove whitespace by default.<\/li>\n\n\n\n<li><code>string<\/code> is the input string you want to remove the specified character<\/li>\n\n\n\n<li><code>LEADING<\/code>, <code>TRAILING<\/code> and <code>BOTH<\/code> specifies which part of the string you want ot remove the specified characters. The <code>LEADING<\/code>, <code>TRAILING<\/code>, and <code>BOTH<\/code> are the start, the end, or both ends of a string.<\/li>\n<\/ul>\n\n\n\n<p>The <code>TRIM()<\/code> function returns <code>NULL<\/code> if <code>characters<\/code> or <code>string<\/code> is <code>NULL<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='basic-sql-trim-function-examples'>Basic SQL TRIM function examples <a href=\"#basic-sql-trim-function-examples\" class=\"anchor\" id=\"basic-sql-trim-function-examples\" title=\"Anchor for Basic SQL TRIM function examples\">#<\/a><\/h2>\n\n\n\n<p>The following statement uses the <code>TRIM<\/code> function with the <code>TRAILING<\/code> option to remove the character <code>*<\/code> at the end of a string:<\/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  <span class=\"hljs-keyword\">TRIM<\/span>(\n    TRAILING <span class=\"hljs-string\">'*'<\/span>\n    <span class=\"hljs-keyword\">FROM<\/span>\n      <span class=\"hljs-string\">'***SQL**'<\/span>\n  ) <span class=\"hljs-keyword\">result<\/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<p><a href=\"https:\/\/www.sqltutorial.org\/playground\/?q=U0VMRUNUIFRSSU0oIFRSQUlMSU5HICcqJyBGUk9NICcqKipTUUwqKicgKSByZXN1bHQ7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> result\n--------\n ***SQL<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following query uses the <code>TRIM<\/code> function with the <code>LEADING<\/code> option to remove all character <code>*<\/code> from the start of a string:<\/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\">SELECT<\/span>\n  <span class=\"hljs-keyword\">TRIM<\/span>(\n    <span class=\"hljs-keyword\">LEADING<\/span> <span class=\"hljs-string\">'*'<\/span>\n    <span class=\"hljs-keyword\">FROM<\/span>\n      <span class=\"hljs-string\">'***SQL**'<\/span>\n  ) <span class=\"hljs-keyword\">result<\/span>;<\/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><a href=\"https:\/\/www.sqltutorial.org\/playground\/?q=U0VMRUNUIFRSSU0oIExFQURJTkcgRlJPTSAnIFNRTCAnICk7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> result\n--------\n SQL**<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">plaintext<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">plaintext<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The following example uses the <code>BOTH<\/code> option to remove the character <code>*<\/code> from the start and the end of a string:<\/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\">SELECT<\/span>\n  <span class=\"hljs-keyword\">TRIM<\/span>(\n    <span class=\"hljs-keyword\">BOTH<\/span> <span class=\"hljs-string\">'*'<\/span>\n    <span class=\"hljs-keyword\">FROM<\/span>\n      <span class=\"hljs-string\">'***SQL**'<\/span>\n  ) <span class=\"hljs-keyword\">result<\/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><a href=\"https:\/\/www.sqltutorial.org\/playground\/?q=U0VMRUNUIFRSSU0oIEJPVEggJyonIEZST00gJyoqKlNRTCoqJyApIHJlc3VsdDs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\"> result\n--------\n SQL<\/code><\/span><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='removing-leading-zeros'>Removing leading zeros <a href=\"#removing-leading-zeros\" class=\"anchor\" id=\"removing-leading-zeros\" title=\"Anchor for Removing leading zeros\">#<\/a><\/h2>\n\n\n\n<p>The following query uses the TRIM function to remove the leading zeros of a string:<\/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  <span class=\"hljs-keyword\">TRIM<\/span>(\n    <span class=\"hljs-keyword\">LEADING<\/span> <span class=\"hljs-string\">'0'<\/span>\n    <span class=\"hljs-keyword\">FROM<\/span>\n      <span class=\"hljs-string\">'00001900'<\/span>\n  ) <span class=\"hljs-keyword\">result<\/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>Output:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"> result\n<span class=\"hljs-comment\">--------<\/span>\n 1900<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><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='cleaning-up-data-in-the-database'>Cleaning up data in the database <a href=\"#cleaning-up-data-in-the-database\" class=\"anchor\" id=\"cleaning-up-data-in-the-database\" title=\"Anchor for Cleaning up data in the database\">#<\/a><\/h2>\n\n\n\n<p>The following <code><a href=\"https:\/\/www.sqltutorial.org\/sql-select\/\">SELECT<\/a><\/code> statement uses the <code><a href=\"https:\/\/www.sqltutorial.org\/sql-string-functions\/sql-trim\/\">TRIM<\/a><\/code> function in the <code><a href=\"https:\/\/www.sqltutorial.org\/sql-update\/\">UPDATE<\/a><\/code> statement to remove all leading and trailing spaces in the <code>first_name<\/code>, <code>last_name<\/code>, <code>email<\/code>, and <code>phone_number<\/code> columns of the <code>employees<\/code> table:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"169\" height=\"273\" src=\"https:\/\/www.sqltutorial.org\/wp-content\/uploads\/2016\/03\/employees.png\" alt=\"SQL TRIM Function - employees Table \" class=\"wp-image-237\" title=\"SQL TRIM example\"\/><\/figure>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\"><span class=\"hljs-keyword\">UPDATE<\/span> employees \n<span class=\"hljs-keyword\">SET<\/span> \n    first_name = <span class=\"hljs-keyword\">TRIM<\/span>(first_name),\n    last_name = <span class=\"hljs-keyword\">TRIM<\/span>(last_name),\n    email = <span class=\"hljs-keyword\">TRIM<\/span>(email),\n    phone_number = <span class=\"hljs-keyword\">TRIM<\/span>(phone_number);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><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><a href=\"https:\/\/www.sqltutorial.org\/playground\/?q=VVBEQVRFIGVtcGxveWVlcyBTRVQgZmlyc3RfbmFtZSA9IFRSSU0oZmlyc3RfbmFtZSksIGxhc3RfbmFtZSA9IFRSSU0obGFzdF9uYW1lKSwgZW1haWwgPSBUUklNKGVtYWlsKSwgcGhvbmVfbnVtYmVyID0gVFJJTShwaG9uZV9udW1iZXIpOw%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='summary'>Summary <a href=\"#summary\" class=\"anchor\" id=\"summary\" title=\"Anchor for Summary\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the <code>TRIM<\/code> function to remove a specified character from a string.<\/li>\n\n\n\n<li>Use the <code>LEADING<\/code> option to remove a specified character from the start of a string.<\/li>\n\n\n\n<li>Use the <code>TRAILING<\/code> option to remove a specified character from the end of a string.<\/li>\n\n\n\n<li>Use the <code>BOTH<\/code> option to remove a specified character from both ends of a string.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='databases'>Databases <a href=\"#databases\" class=\"anchor\" id=\"databases\" title=\"Anchor for Databases\">#<\/a><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.pgtutorial.com\/postgresql-string-functions\/postgresql-trim\/\" target=\"_blank\" rel=\"noreferrer noopener\">PostgreSQL TRIM Function<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.mysqltutorial.org\/mysql-string-functions\/mysql-trim-function\/\" target=\"_blank\" rel=\"noreferrer noopener\">MySQL TRIM Function<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.sqlitetutorial.net\/sqlite-functions\/sqlite-trim\/\" target=\"_blank\" rel=\"noreferrer noopener\">SQLite TRIM Function<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.db2tutorial.com\/db2-string-functions\/db2-trim\/\" target=\"_blank\" rel=\"noreferrer noopener\">Db2 TRIM Function<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.oracletutorial.com\/oracle-string-functions\/oracle-trim\/\" target=\"_blank\" rel=\"noreferrer noopener\">Oracle TRIM Function<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-string-functions\/sql-server-trim-function\/\" target=\"_blank\" rel=\"noreferrer noopener\">SQL Server TRIM Function<\/a><\/li>\n<\/ul>\n<div class=\"helpful-block-content\" data-title=\"\">\n\t<header>\n\t\t<div 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