{"id":3485,"date":"2024-05-05T15:18:08","date_gmt":"2024-05-05T08:18:08","guid":{"rendered":"https:\/\/www.sqlitetutorial.net\/?page_id=3485"},"modified":"2024-05-05T15:18:16","modified_gmt":"2024-05-05T08:18:16","slug":"sqlite-update-from","status":"publish","type":"page","link":"https:\/\/www.sqlitetutorial.net\/sqlite-update-from\/","title":{"rendered":"SQLite UPDATE FROM Statement"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you will learn how to use the SQLite <code>UPDATE FROM<\/code> statement to update data in one table based on data from another table.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Introduction to the SQLite UPDATE FROM statement<\/h2>\n\n\n\n<p>In SQLite, the <code>UPDATE FROM<\/code> statement allows you to <a href=\"https:\/\/www.sqlitetutorial.net\/sqlite-update\/\">update data<\/a> in one table based on data from another table.<\/p>\n\n\n\n<p>The <code>UPDATE FROM<\/code> statement is often referred to as the <code>UPDATE JOIN<\/code> because it involves two tables.<\/p>\n\n\n\n<p>Here&#8217;s the syntax for the <code>UPDATE FROM<\/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> target_table\n<span class=\"hljs-keyword\">SET<\/span>\n  column1 = value1,\n  column2 = value2\n<span class=\"hljs-keyword\">FROM<\/span>\n  source_table\n&#91;<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 table to update in the <code>UPDATE<\/code> clause.<\/li>\n\n\n\n<li>Second, set the columns in the target table to the specified values in the <code>SET<\/code> clause.<\/li>\n\n\n\n<li>Third, specify the second table or a subquery from which the data is retrieved for updating the target table in the <code>FROM<\/code> clause<\/li>\n\n\n\n<li>Finally, specify a condition in the <code>WHERE<\/code> clause to filter the rows to be updated.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">SQLite UPDATE FROM statement examples<\/h2>\n\n\n\n<p>Let&#8217;s explore some examples of using the SQLite <code>UPDATE FROM<\/code> statement.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1) Using a table in the SQLite UPDATE FROM statement<\/h3>\n\n\n\n<p>First, <a href=\"https:\/\/www.sqlitetutorial.net\/sqlite-create-table\/\">create a table<\/a> called <code>sales_employees<\/code>:<\/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\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> sales_employees (\n    <span class=\"hljs-keyword\">id<\/span> <span class=\"hljs-built_in\">INTEGER<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>,\n    <span class=\"hljs-keyword\">name<\/span> <span class=\"hljs-built_in\">TEXT<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span>, \n    salary <span class=\"hljs-built_in\">REAL<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span>\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<p>Next, create another table called <code>sales_performances<\/code>:<\/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\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> sales_performances (\n    sales_employee_id <span class=\"hljs-built_in\">INT<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>,\n    score <span class=\"hljs-built_in\">INTEGER<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span> <span class=\"hljs-keyword\">CHECK<\/span> (score <span class=\"hljs-keyword\">BETWEEN<\/span> <span class=\"hljs-number\">1<\/span> <span class=\"hljs-keyword\">AND<\/span> <span class=\"hljs-number\">5<\/span>),\n    <span class=\"hljs-keyword\">FOREIGN<\/span> <span class=\"hljs-keyword\">KEY<\/span> (sales_employee_id) <span class=\"hljs-keyword\">REFERENCES<\/span> sales_employees(<span class=\"hljs-keyword\">id<\/span>)\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>Then, <a href=\"https:\/\/www.sqlitetutorial.net\/sqlite-insert\/\">insert some rows<\/a> into these tables:<\/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\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span>\n  sales_employees (<span class=\"hljs-keyword\">name<\/span>, salary)\n<span class=\"hljs-keyword\">VALUES<\/span>\n  (<span class=\"hljs-string\">'John Doe'<\/span>, <span class=\"hljs-number\">3000.0<\/span>),\n  (<span class=\"hljs-string\">'Jane Smith'<\/span>, <span class=\"hljs-number\">3200.0<\/span>),\n  (<span class=\"hljs-string\">'Michael Johnson'<\/span>, <span class=\"hljs-number\">2800.0<\/span>);\n\n<span class=\"hljs-keyword\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span>\n  sales_performances (sales_employee_id, score)\n<span class=\"hljs-keyword\">VALUES<\/span>\n  (<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">3<\/span>),\n  (<span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">4<\/span>),\n  (<span class=\"hljs-number\">3<\/span>, <span class=\"hljs-number\">2<\/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>After that, increase the salary of sales employees based on their performance scores:<\/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\">UPDATE<\/span> sales_employees <span class=\"hljs-keyword\">AS<\/span> e\n<span class=\"hljs-keyword\">SET<\/span>\n  salary = <span class=\"hljs-keyword\">CASE<\/span> s.score\n    <span class=\"hljs-keyword\">WHEN<\/span> <span class=\"hljs-number\">1<\/span> <span class=\"hljs-keyword\">THEN<\/span> salary * <span class=\"hljs-number\">1.02<\/span> <span class=\"hljs-comment\">-- 2% increase for score 1<\/span>\n    <span class=\"hljs-keyword\">WHEN<\/span> <span class=\"hljs-number\">2<\/span> <span class=\"hljs-keyword\">THEN<\/span> salary * <span class=\"hljs-number\">1.04<\/span> <span class=\"hljs-comment\">-- 4% increase for score 2<\/span>\n    <span class=\"hljs-keyword\">WHEN<\/span> <span class=\"hljs-number\">3<\/span> <span class=\"hljs-keyword\">THEN<\/span> salary * <span class=\"hljs-number\">1.06<\/span> <span class=\"hljs-comment\">-- 6% increase for score 3<\/span>\n    <span class=\"hljs-keyword\">WHEN<\/span> <span class=\"hljs-number\">4<\/span> <span class=\"hljs-keyword\">THEN<\/span> salary * <span class=\"hljs-number\">1.08<\/span> <span class=\"hljs-comment\">-- 8% increase for score 4<\/span>\n    <span class=\"hljs-keyword\">WHEN<\/span> <span class=\"hljs-number\">5<\/span> <span class=\"hljs-keyword\">THEN<\/span> salary * <span class=\"hljs-number\">1.10<\/span> <span class=\"hljs-comment\">-- 10% increase for score 5<\/span>\n  <span class=\"hljs-keyword\">END<\/span>\n<span class=\"hljs-keyword\">FROM<\/span>\n  sales_performances <span class=\"hljs-keyword\">AS<\/span> s\n<span class=\"hljs-keyword\">WHERE<\/span>\n  e.id = s.sales_employee_id;<\/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>Finally, verify the update:<\/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> * <span class=\"hljs-keyword\">FROM<\/span> sales_employees;<\/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>Output:<\/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\">id  name             salary\n<span class=\"hljs-comment\">--  ---------------  ------<\/span>\n1   John Doe         3180.0\n2   Jane Smith       3456.0\n3   Michael Johnson  2912.0<\/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<h3 class=\"wp-block-heading\">2) Using a subquery in the UPDATE FROM statement<\/h3>\n\n\n\n<p>First, create a table called <code>inventory<\/code> that stores the inventory:<\/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\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> inventory (\n    item_id <span class=\"hljs-built_in\">INTEGER<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>,\n    item_name <span class=\"hljs-built_in\">TEXT<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span>,\n    quantity <span class=\"hljs-built_in\">INTEGER<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-literal\">NULL<\/span>\n);<\/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<p>Second, create a table called <code>sales<\/code> that stores the daily sales data:<\/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\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> sales (\n    sales_id <span class=\"hljs-built_in\">INTEGER<\/span> PRIMARY <span class=\"hljs-keyword\">KEY<\/span>,\n    item_id <span class=\"hljs-built_in\">INTEGER<\/span>,\n    quantity_sold <span class=\"hljs-built_in\">INTEGER<\/span>,\n    sales_at <span class=\"hljs-built_in\">TIMESTAMP<\/span> <span class=\"hljs-keyword\">DEFAULT<\/span> <span class=\"hljs-keyword\">CURRENT_TIMESTAMP<\/span>,\n    <span class=\"hljs-keyword\">FOREIGN<\/span> <span class=\"hljs-keyword\">KEY<\/span> (item_id) <span class=\"hljs-keyword\">REFERENCES<\/span> inventory (item_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>Third, insert rows into the <code>inventory<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-10\" 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  inventory (item_id, item_name, quantity)\n<span class=\"hljs-keyword\">VALUES<\/span>\n  (<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-string\">'Item A'<\/span>, <span class=\"hljs-number\">100<\/span>),\n  (<span class=\"hljs-number\">2<\/span>, <span class=\"hljs-string\">'Item B'<\/span>, <span class=\"hljs-number\">150<\/span>),\n  (<span class=\"hljs-number\">3<\/span>, <span class=\"hljs-string\">'Item C'<\/span>, <span class=\"hljs-number\">200<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><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>Fourth, insert rows into the <code>sales<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" 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  sales (item_id, quantity_sold)\n<span class=\"hljs-keyword\">VALUES<\/span>\n  (<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">20<\/span>),\n  (<span class=\"hljs-number\">1<\/span>, <span class=\"hljs-number\">30<\/span>),\n  (<span class=\"hljs-number\">2<\/span>, <span class=\"hljs-number\">25<\/span>),\n  (<span class=\"hljs-number\">3<\/span>, <span class=\"hljs-number\">50<\/span>);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><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>Fifth, update the <code>inventory<\/code> table based on the aggregated daily sales from the <code>sales<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-12\" 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> inventory\n<span class=\"hljs-keyword\">SET<\/span>\n  quantity = quantity - daily.qty\n<span class=\"hljs-keyword\">FROM<\/span>\n  (\n    <span class=\"hljs-keyword\">SELECT<\/span>\n      <span class=\"hljs-keyword\">SUM<\/span>(quantity_sold) <span class=\"hljs-keyword\">AS<\/span> qty,\n      item_id\n    <span class=\"hljs-keyword\">FROM<\/span>\n      sales\n    <span class=\"hljs-keyword\">GROUP<\/span> <span class=\"hljs-keyword\">BY<\/span>\n      item_id\n  ) <span class=\"hljs-keyword\">AS<\/span> daily\n<span class=\"hljs-keyword\">WHERE<\/span>\n  inventory.item_id = daily.item_id;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><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>Finally, verify the update by querying data from the <code>inventory<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" 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> * <span class=\"hljs-keyword\">FROM<\/span> inventory;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><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-14\" data-shcb-language-name=\"SQL (Structured Query Language)\" data-shcb-language-slug=\"sql\"><span><code class=\"hljs language-sql\">item_id  item_name  quantity\n<span class=\"hljs-comment\">-------  ---------  --------<\/span>\n1        Item A     50\n2        Item B     125\n3        Item C     150<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><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 output indicates that the item quantities in the <code>inventory<\/code> table have been adjusted based on the aggregated sales quantities from the <code>sales<\/code> table.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use the <code>UPDATE FROM<\/code> statement to update data in one table based on the data from another table.<\/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=\"3485\"\n\t\t\t\tdata-post-url=\"https:\/\/www.sqlitetutorial.net\/sqlite-update-from\/\"\n\t\t\t\tdata-post-title=\"SQLite UPDATE FROM Statement\"\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 24\"\n\t\t\t\t\tfill=\"none\"\n\t\t\t\t\tstroke=\"currentColor\"\n\t\t\t\t\tstroke-width=\"2\"\n\t\t\t\t\tstroke-linecap=\"round\"\n\t\t\t\t\tstroke-linejoin=\"round\"\n\t\t\t\t\tclass=\"feather feather-thumbs-up block w-full 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