{"id":375,"date":"2016-04-02T05:00:55","date_gmt":"2016-04-02T05:00:55","guid":{"rendered":"https:\/\/sqltutorial.org\/?page_id=375"},"modified":"2025-02-08T04:45:41","modified_gmt":"2025-02-08T11:45:41","slug":"sql-update","status":"publish","type":"page","link":"https:\/\/www.sqltutorial.org\/sql-update\/","title":{"rendered":"SQL UPDATE"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the SQL <code>UPDATE<\/code> statement to modify one or more rows in a table.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='introduction-to-the-sql-update-statement'>Introduction to the SQL UPDATE statement <a href=\"#introduction-to-the-sql-update-statement\" class=\"anchor\" id=\"introduction-to-the-sql-update-statement\" title=\"Anchor for Introduction to the SQL UPDATE statement\">#<\/a><\/h2>\n\n\n\n<p>In SQL, you use the <code>UPDATE<\/code> statement to modify data of one or more rows in a table. <\/p>\n\n\n\n<p>Here&#8217;s the syntax of using the <code>UPDATE<\/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\">UPDATE<\/span> table_name\n<span class=\"hljs-keyword\">SET<\/span>\n  column1 = value1,\n  column2 = value2\n<span class=\"hljs-keyword\">WHERE<\/span>\n  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>In this syntax:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, specify the name of the table in which you want to update data in the <code>UPDATE<\/code> clause.<\/li>\n\n\n\n<li>Second, list the column names and new values in the <code>SET<\/code> clause. The columns that do not appear in the <code>SET<\/code> clause will retain their original values.<\/li>\n\n\n\n<li>Third, specify a condition in the the <code><a href=\"https:\/\/www.sqltutorial.org\/sql-where\/\">WHERE<\/a><\/code> clause to identify the rows for updating.<\/li>\n<\/ul>\n\n\n\n<p>The <code>WHERE<\/code> clause is optional. If you omit the <code>WHERE<\/code> clause, the <code>UPDATE<\/code> statement will update all the rows in the table:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">UPDATE table_name\nSET\n  column1 = value1,\n  column2 = value2;<\/code><\/span><\/pre>\n\n\n<h2 class=\"wp-block-heading\" id='sql-update-statement-examples'>SQL UPDATE statement examples <a href=\"#sql-update-statement-examples\" class=\"anchor\" id=\"sql-update-statement-examples\" title=\"Anchor for SQL UPDATE statement examples\">#<\/a><\/h2>\n\n\n\n<p>We&#8217;ll use the <code>dependents<\/code> and <code>employees<\/code> tables from the <a href=\"https:\/\/www.sqltutorial.org\/sql-sample-database\/\">sample database<\/a> to demonstrate the <code>UPDATE<\/code> statement:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"495\" height=\"270\" src=\"https:\/\/www.sqltutorial.org\/wp-content\/uploads\/2016\/03\/employees_dependents_tables.png\" alt=\"SQL UPDATE Statement - employees &amp; dependents tables\" class=\"wp-image-274\" srcset=\"https:\/\/www.sqltutorial.org\/wp-content\/uploads\/2016\/03\/employees_dependents_tables.png 495w, https:\/\/www.sqltutorial.org\/wp-content\/uploads\/2016\/03\/employees_dependents_tables-300x164.png 300w\" sizes=\"auto, (max-width: 495px) 100vw, 495px\" \/><\/figure>\n\n\n\n<p>If you have not followed the <code><a href=\"https:\/\/www.sqltutorial.org\/sql-insert\/\">INSERT<\/a><\/code> tutorial, you need to run the following statement before continuing the tutorial:<\/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\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span>\n  dependents (first_name, last_name, relationship, employee_id)\n<span class=\"hljs-keyword\">VALUES<\/span>\n  (<span class=\"hljs-string\">'Cameron'<\/span>, <span class=\"hljs-string\">'Bell'<\/span>, <span class=\"hljs-string\">'Child'<\/span>, <span class=\"hljs-number\">192<\/span>),\n  (<span class=\"hljs-string\">'Michelle'<\/span>, <span class=\"hljs-string\">'Bell'<\/span>, <span class=\"hljs-string\">'Child'<\/span>, <span class=\"hljs-number\">192<\/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<h3 class=\"wp-block-heading\" id='updating-one-row-in-a-table'>Updating one row in a table <a href=\"#updating-one-row-in-a-table\" class=\"anchor\" id=\"updating-one-row-in-a-table\" title=\"Anchor for Updating one row in a table\">#<\/a><\/h3>\n\n\n\n<p>Suppose the employee id 192 Sarah Bell changed her last name from <code>Bell<\/code> to <code>Lopez<\/code> and you need to update her record in the &nbsp;<code>employees<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">SELECT\n  employee_id,\n  first_name,\n  last_name\nFROM\n  employees\nWHERE\n  employee_id = 192;<\/code><\/span><\/pre>\n\n\n<p>Output:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\"> employee_id | first_name | last_name\n-------------+------------+-----------\n         192 | Sarah      | Bell<\/code><\/span><\/pre>\n\n\n<p>To update Sarah&#8217;s last name from&nbsp; <code>Bell<\/code> to <code>Lopez<\/code>, you use the following <code>UPDATE<\/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\">UPDATE<\/span> employees\n<span class=\"hljs-keyword\">SET<\/span>\n  last_name = <span class=\"hljs-string\">'Lopez'<\/span>\n<span class=\"hljs-keyword\">WHERE<\/span>\n  employee_id = <span class=\"hljs-number\">192<\/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><a href=\"https:\/\/www.sqltutorial.org\/playground\/?db=salaries&amp;q=VVBEQVRFIGVtcGxveWVlcyBTRVQgbGFzdF9uYW1lID0gJ0xvcGV6JyBXSEVSRSBlbXBsb3llZV9pZCA9IDE5Mjs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>The database system updated value in the <code>last_name<\/code> column and the row with &nbsp;<code>employee_id<\/code>&nbsp;<code>192<\/code>.<\/p>\n\n\n\n<p>To verify the update, you can use the following <code>SELECT<\/code> statement:<\/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  employee_id,\n  first_name,\n  last_name\n<span class=\"hljs-keyword\">FROM<\/span>\n  employees\n<span class=\"hljs-keyword\">WHERE<\/span>\n  employee_id = <span class=\"hljs-number\">192<\/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=U0VMRUNUIGVtcGxveWVlX2lkLCBmaXJzdF9uYW1lLCBsYXN0X25hbWUgRlJPTSBlbXBsb3llZXMgV0hFUkUgZW1wbG95ZWVfaWQgPSAxOTI7\" 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\"> employee_id | first_name | last_name\n-------------+------------+-----------\n         192 | Sarah      | Lopez<\/code><\/span><\/pre>\n\n\n<h3 class=\"wp-block-heading\" id='updating-multiple-rows-in-a-table'>Updating multiple rows in a table <a href=\"#updating-multiple-rows-in-a-table\" class=\"anchor\" id=\"updating-multiple-rows-in-a-table\" title=\"Anchor for Updating multiple rows in a table\">#<\/a><\/h3>\n\n\n\n<p><code>Nancy<\/code> wants to change all her children&#8217;s last names from <code>Bell<\/code> to <code>Lopez<\/code>. In this case, you need to update all Nancy&#8217;s dependents in the <code>dependents<\/code> table.<\/p>\n\n\n\n<p>Before updating the data, let&#8217;s check the dependents of <code>Nancy<\/code>.<\/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\">SELECT<\/span>\n  *\n<span class=\"hljs-keyword\">FROM<\/span>\n  dependents\n<span class=\"hljs-keyword\">WHERE<\/span>\n  employee_id = <span class=\"hljs-number\">192<\/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><a href=\"https:\/\/www.sqltutorial.org\/playground\/?q=U0VMRUNUICogRlJPTSBkZXBlbmRlbnRzIFdIRVJFIGVtcGxveWVlX2lkID0gMTkyOw%3D%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> dependent_id | first_name | last_name | relationship | employee_id\n--------------+------------+-----------+--------------+-------------\n           32 | Cameron    | Bell      | Child        |         192\n           33 | Michelle   | Bell      | Child        |         192<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><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>To update the last names of Nancy&#8217;s dependents, you use the following <code>UPDATE<\/code> statement.<\/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\">UPDATE<\/span> dependents\n<span class=\"hljs-keyword\">SET<\/span>\n  last_name = <span class=\"hljs-string\">'Lopez'<\/span>\n<span class=\"hljs-keyword\">WHERE<\/span>\n  employee_id = <span class=\"hljs-number\">192<\/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><a href=\"https:\/\/www.sqltutorial.org\/playground\/?q=VVBEQVRFIGRlcGVuZGVudHMgU0VUIGxhc3RfbmFtZSA9ICdMb3BleicgV0hFUkUgZW1wbG95ZWVfaWQgPSAxOTI7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> dependent_id | first_name | last_name | relationship | employee_id\n--------------+------------+-----------+--------------+-------------\n           32 | Cameron    | Lopez     | Child        |         192\n           33 | Michelle   | Lopez     | Child        |         192<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><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<h3 class=\"wp-block-heading\" id='using-sql-update-statement-with-a-subquery'>Using SQL UPDATE statement with a subquery <a href=\"#using-sql-update-statement-with-a-subquery\" class=\"anchor\" id=\"using-sql-update-statement-with-a-subquery\" title=\"Anchor for Using SQL UPDATE statement with a subquery\">#<\/a><\/h3>\n\n\n\n<p>Sometimes when employees change their last names, you update the &nbsp;<code>employees<\/code> table only without updating the <code>dependents<\/code> table.<\/p>\n\n\n\n<p>To ensure that the last names of children are them same as the last name of parents in the &nbsp;<code>employees<\/code> table, you use the following <code>UPDATE<\/code> statement:<\/p>\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> dependents\n<span class=\"hljs-keyword\">SET<\/span>\n  last_name = (\n    <span class=\"hljs-keyword\">SELECT<\/span>\n      last_name\n    <span class=\"hljs-keyword\">FROM<\/span>\n      employees\n    <span class=\"hljs-keyword\">WHERE<\/span>\n      employee_id = dependents.employee_id\n  );<\/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=VVBEQVRFIGRlcGVuZGVudHMgU0VUIGxhc3RfbmFtZSA9ICggU0VMRUNUIGxhc3RfbmFtZSBGUk9NIGVtcGxveWVlcyBXSEVSRSBlbXBsb3llZV9pZCA9IGRlcGVuZGVudHMuZW1wbG95ZWVfaWQgKTs%3D\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>How the query works:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First, use a <a href=\"https:\/\/www.sqltutorial.org\/sql-subquery\/\">subquery<\/a> to get the last names  from the &nbsp;<code>employees<\/code> table and use them in the <code>SET<\/code> clause for updating last names in the <code>dependents<\/code> table.<\/li>\n\n\n\n<li>Second, omit the <code>WHERE<\/code> clause to update all the rows in the <code>dependents<\/code> table.<\/li>\n<\/ul>\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>UPDATE<\/code> statement to update one or more rows in a table.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id='quiz'>Quiz <a href=\"#quiz\" class=\"anchor\" id=\"quiz\" title=\"Anchor for Quiz\">#<\/a><\/h2>\n\n\n\n<iframe loading=\"lazy\"\n  name=\"quiz\"\n  src=\"\/quiz\/?quiz=update\"\n  height=\"700\"\n  width=\"600\"\n  class=\"iframe\"\n><\/iframe>\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-tutorial\/postgresql-update\/\" target=\"_blank\" rel=\"noreferrer noopener\">PostgreSQL UPDATE Statement<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.mysqltutorial.org\/mysql-basics\/mysql-update\/\" target=\"_blank\" rel=\"noreferrer noopener\">MySQL UPDATE Statement<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.mariadbtutorial.com\/mariadb-basics\/mariadb-update\/\" target=\"_blank\" rel=\"noreferrer noopener\">MariaDB UPDATE Statement<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.sqlitetutorial.net\/sqlite-update\/\" target=\"_blank\" rel=\"noreferrer noopener\">SQLite UPDATE Statement<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.db2tutorial.com\/db2-basics\/db2-update\/\" target=\"_blank\" rel=\"noreferrer noopener\">Db2 UPDATE Statement<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.oracletutorial.com\/oracle-basics\/oracle-update\/\" target=\"_blank\" rel=\"noreferrer noopener\">Oracle UPDATE Statement<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/www.sqlservertutorial.net\/sql-server-basics\/sql-server-update\/\" target=\"_blank\" rel=\"noreferrer noopener\">SQL Server UPDATE Statement<\/a><\/li>\n<\/ul>\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=\"375\"\n\t\t\t\tdata-post-url=\"https:\/\/www.sqltutorial.org\/sql-update\/\"\n\t\t\t\tdata-post-title=\"SQL UPDATE\"\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 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table.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":32,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-375","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SQL UPDATE Statement<\/title>\n<meta name=\"description\" content=\"In this tutorial, you will learn how to use the SQL UPDATE statement to modify one or more rows in a table.\" \/>\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.sqltutorial.org\/sql-update\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL UPDATE Statement\" \/>\n<meta property=\"og:description\" content=\"In this 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