{"id":525,"date":"2024-11-30T21:39:46","date_gmt":"2024-11-30T14:39:46","guid":{"rendered":"https:\/\/www.pgtutorial.com\/?page_id=525"},"modified":"2025-01-02T11:15:59","modified_gmt":"2025-01-02T04:15:59","slug":"postgresql-boolean","status":"publish","type":"page","link":"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-boolean\/","title":{"rendered":"PostgreSQL Boolean Type"},"content":{"rendered":"\n<p><strong>Summary<\/strong>: in this tutorial, you&#8217;ll learn how to use the PostgreSQL <code>boolean<\/code> type to store Boolean values including <code>true<\/code> and <code>false<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='getting-started-with-postgresql-boolean-type'>Getting started with PostgreSQL boolean type <a href=\"#getting-started-with-postgresql-boolean-type\" class=\"anchor\" id=\"getting-started-with-postgresql-boolean-type\" title=\"Anchor for Getting started with PostgreSQL boolean type\">#<\/a><\/h2>\n\n\n\n<p>In PostgreSQL, you use the <code>boolean<\/code> type to store Boolean data, including <code>true<\/code> and <code>false<\/code>.<\/p>\n\n\n\n<p>The <code>boolean<\/code> type has three values:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>true<\/code><\/li>\n\n\n\n<li><code>false<\/code><\/li>\n\n\n\n<li><code>NULL<\/code><\/li>\n<\/ul>\n\n\n\n<p><code>NULL<\/code> represents the unknown state.<\/p>\n\n\n\n<p>PostgreSQL uses the <code>boolean<\/code> keyword to represent the <code>boolean<\/code> type. You can also use <code>bool<\/code>, an abbreviation for the <code>boolean<\/code> type.<\/p>\n\n\n\n<p>PostgreSQL uses 1 byte for storing a <code>boolean<\/code> value.<\/p>\n\n\n\n<p>Besides <code>true<\/code> and <code>false<\/code>, PostgreSQL uses various representations for <code>true<\/code> and <code>false<\/code> in SQL queries:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>True<\/th><th>False<\/th><\/tr><\/thead><tbody><tr><td>true<\/td><td>false<\/td><\/tr><tr><td>&#8216;t&#8217;<\/td><td>&#8216;f&#8217;<\/td><\/tr><tr><td>&#8216;true&#8217;<\/td><td>&#8216;false&#8217;<\/td><\/tr><tr><td>&#8216;y&#8217;<\/td><td>&#8216;n&#8217;<\/td><\/tr><tr><td>&#8216;yes&#8217;<\/td><td>&#8216;no&#8217;<\/td><\/tr><tr><td>&#8216;1&#8217;<\/td><td>&#8216;0&#8217;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Notice that all other values need to be surrounded by single quotes except <code>true<\/code> and <code>false<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='postgresql-boolean-type-examples'>PostgreSQL boolean type examples <a href=\"#postgresql-boolean-type-examples\" class=\"anchor\" id=\"postgresql-boolean-type-examples\" title=\"Anchor for PostgreSQL boolean type examples\">#<\/a><\/h2>\n\n\n\n<p>First, <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-create-table\/\">create a table<\/a> called <code>products<\/code> to store product data:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> products (\n  id <span class=\"hljs-type\">INT<\/span> <span class=\"hljs-keyword\">GENERATED<\/span> <span class=\"hljs-keyword\">ALWAYS<\/span> <span class=\"hljs-keyword\">AS<\/span> <span class=\"hljs-keyword\">IDENTITY<\/span>,\n  <span class=\"hljs-type\">name<\/span> <span class=\"hljs-type\">VARCHAR<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-keyword\">NULL<\/span>,\n  is_active <span class=\"hljs-type\">BOOL<\/span>\n);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The <code>products<\/code> table has the <code>is_active<\/code> column with the type <code>boolean<\/code>, so it can store <code>true<\/code>, <code>false<\/code>, or <code>NULL<\/code>.<\/p>\n\n\n\n<p class=\"note\">If you do not want to store <code>NULL<\/code> in a <code>boolean<\/code> column, you can a the <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-not-null\/\">NOT NULL<\/a> constraint.<\/p>\n\n\n\n<p>Second, <a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-insert\/\">insert some rows<\/a> into the <code>products<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">INSERT<\/span> <span class=\"hljs-keyword\">INTO<\/span>\n  products (<span class=\"hljs-type\">name<\/span>, is_active)\n<span class=\"hljs-keyword\">VALUES<\/span>\n  (<span class=\"hljs-string\">'iPhone 6'<\/span>, <span class=\"hljs-keyword\">false<\/span>),\n  (<span class=\"hljs-string\">'iPhone 16'<\/span>, <span class=\"hljs-keyword\">true<\/span>),\n  (<span class=\"hljs-string\">'Galaxy M01'<\/span>, <span class=\"hljs-string\">'f'<\/span>),\n  (<span class=\"hljs-string\">'Galaxy Z Fold6'<\/span>, <span class=\"hljs-string\">'t'<\/span>),\n  (<span class=\"hljs-string\">'Galaxy Z Flip6'<\/span>, <span class=\"hljs-keyword\">NULL<\/span>) \n<span class=\"hljs-keyword\">RETURNING<\/span> *;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/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-3\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> id |      name      | is_active\n----+----------------+-----------\n  1 | iPhone 6       | f\n  2 | iPhone 16      | t\n  3 | Galaxy M01     | f\n  4 | Galaxy Z Fold6 | t\n  5 | Galaxy Z Flip6 | NULL<\/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>Third, retrieve the inactive products:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> * <span class=\"hljs-keyword\">FROM<\/span> products\n<span class=\"hljs-keyword\">WHERE<\/span> is_active = <span class=\"hljs-keyword\">false<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=bool&amp;q=U0VMRUNUICogRlJPTSBwcm9kdWN0cyBXSEVSRSBpc19hY3RpdmUgPSBmYWxzZTs\" 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\"> id |    name    | is_active\n----+------------+-----------\n  1 | iPhone 6   | f\n  3 | Galaxy M01 | f<\/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>You can use other false values like <code>'f'<\/code>, <code>'0'<\/code>,<code> 'n'<\/code>, or <code>'no'<\/code>. For example:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> * <span class=\"hljs-keyword\">FROM<\/span> products\n<span class=\"hljs-keyword\">WHERE<\/span> is_active = <span class=\"hljs-string\">'f'<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=bool&amp;q=U0VMRUNUICogRlJPTSBwcm9kdWN0cyBXSEVSRSBpc19hY3RpdmUgPSAnZic7\" target=\"_blank\" rel=\"noreferrer noopener\">Try it<\/a><\/p>\n\n\n\n<p>Fourth, query the active products from the <code>products<\/code> table:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> * <span class=\"hljs-keyword\">FROM<\/span> products\n<span class=\"hljs-keyword\">WHERE<\/span> is_active = <span class=\"hljs-keyword\">true<\/span>;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=bool&amp;q=U0VMRUNUICogRlJPTSBwcm9kdWN0cyBXSEVSRSBpc19hY3RpdmUgPSB0cnVlOw\" 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-8\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> id |      name      | is_active\n----+----------------+-----------\n  2 | iPhone 16      | t\n  4 | Galaxy Z Fold6 | t<\/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<h2 class=\"wp-block-heading\" id='implicit-comparisons-with-booleans'>Implicit comparisons with Booleans <a href=\"#implicit-comparisons-with-booleans\" class=\"anchor\" id=\"implicit-comparisons-with-booleans\" title=\"Anchor for Implicit comparisons with Booleans\">#<\/a><\/h2>\n\n\n\n<p>PostgreSQL allows you to use the column name only to compare it with <code>true<\/code> implicitly. For example, the following statement retrieves active products:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-9\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> * <span class=\"hljs-keyword\">FROM<\/span> products\n<span class=\"hljs-keyword\">WHERE<\/span> is_active;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-9\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=bool&amp;q=U0VMRUNUICogRlJPTSBwcm9kdWN0cyBXSEVSRSBpc19hY3RpdmU7\" 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-10\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> id |      name      | is_active\n----+----------------+-----------\n  2 | iPhone 16      | t\n  4 | Galaxy Z Fold6 | t<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-10\"><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 negate the value of a column, you can use the <code>NOT<\/code> operator:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-11\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">SELECT<\/span> * <span class=\"hljs-keyword\">FROM<\/span> products\n<span class=\"hljs-keyword\">WHERE<\/span> <span class=\"hljs-keyword\">NOT<\/span> is_active;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-11\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=bool&amp;q=U0VMRUNUICogRlJPTSBwcm9kdWN0cyBXSEVSRSBOT1QgaXNfYWN0aXZlOw\" 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-12\" data-shcb-language-name=\"plaintext\" data-shcb-language-slug=\"plaintext\"><span><code class=\"hljs language-plaintext\"> id |    name    | is_active\n----+------------+-----------\n  1 | iPhone 6   | f\n  3 | Galaxy M01 | f<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-12\"><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<h2 class=\"wp-block-heading\" id='setting-default-values-for-boolean-columns'>Setting default values for Boolean columns <a href=\"#setting-default-values-for-boolean-columns\" class=\"anchor\" id=\"setting-default-values-for-boolean-columns\" title=\"Anchor for Setting default values for Boolean columns\">#<\/a><\/h2>\n\n\n\n<p>You use the <code><a href=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-default-constraint\/\">DEFAULT<\/a><\/code> constraint to set a default value for a <code>boolean<\/code> column:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-13\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-built_in\">column_name<\/span> <span class=\"hljs-type\">BOOL<\/span> <span class=\"hljs-keyword\">DEFAULT<\/span> boolean_value;<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-13\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>For example, the following statement creates the <code>users<\/code> table with the column <code>email_confirmed<\/code> set to <code>false<\/code> by default:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-14\" data-shcb-language-name=\"PostgreSQL SQL dialect and PL\/pgSQL\" data-shcb-language-slug=\"pgsql\"><span><code class=\"hljs language-pgsql\"><span class=\"hljs-keyword\">CREATE<\/span> <span class=\"hljs-keyword\">TABLE<\/span> users (\n  id <span class=\"hljs-type\">INT<\/span> <span class=\"hljs-keyword\">GENERATED<\/span> <span class=\"hljs-keyword\">ALWAYS<\/span> <span class=\"hljs-keyword\">AS<\/span> <span class=\"hljs-keyword\">IDENTITY<\/span>,\n  email <span class=\"hljs-type\">VARCHAR<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-keyword\">NULL<\/span>,\n  <span class=\"hljs-keyword\">password<\/span> <span class=\"hljs-type\">VARCHAR<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-keyword\">NULL<\/span>,\n  email_confirmed <span class=\"hljs-type\">BOOL<\/span> <span class=\"hljs-keyword\">NOT<\/span> <span class=\"hljs-keyword\">NULL<\/span> <span class=\"hljs-keyword\">DEFAULT<\/span> <span class=\"hljs-keyword\">false<\/span>\n);<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-14\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PostgreSQL SQL dialect and PL\/pgSQL<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">pgsql<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p><a href=\"https:\/\/www.pgtutorial.com\/playground\/?db=bool&amp;q=Q1JFQVRFIFRBQkxFIHVzZXJzICggaWQgSU5UIEdFTkVSQVRFRCBBTFdBWVMgQVMgSURFTlRJVFksIGVtYWlsIFZBUkNIQVIgTk9UIE5VTEwsIHBhc3N3b3JkIFZBUkNIQVIgTk9UIE5VTEwsIGVtYWlsX2NvbmZpcm1lZCBCT09MIE5PVCBOVUxMIERFRkFVTFQgZmFsc2UgKTs\" 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 PostgreSQL <code>boolean<\/code> type to store Boolean values.<\/li>\n\n\n\n<li>PostgreSQL uses implicit comparisons for Boolean values.<\/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=boolean\"\n  height=\"700\"\n  width=\"600\"\n  class=\"iframe\"\n><\/iframe>\n\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=\"525\"\n\t\t\t\tdata-post-url=\"https:\/\/www.pgtutorial.com\/postgresql-tutorial\/postgresql-boolean\/\"\n\t\t\t\tdata-post-title=\"PostgreSQL Boolean Type\"\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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and false. Getting started with PostgreSQL boolean type # In PostgreSQL, you use the boolean type to store Boolean data, including true and false. The boolean type has three values: NULL represents the unknown state. PostgreSQL [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":13,"menu_order":37,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-525","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>PostgreSQL Boolean<\/title>\n<meta name=\"description\" content=\"In this tutorial, you&#039;ll learn how to use the PostgreSQL boolean type to store Boolean values including true and false.\" \/>\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.pgtutorial.com\/postgresql-tutorial\/postgresql-boolean\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"PostgreSQL Boolean\" 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