{"id":353,"date":"2024-08-26T06:19:38","date_gmt":"2024-08-26T06:19:38","guid":{"rendered":"https:\/\/techkubo.com\/sql\/?p=353"},"modified":"2025-05-23T10:49:30","modified_gmt":"2025-05-23T10:49:30","slug":"sql-data-types","status":"publish","type":"post","link":"https:\/\/techkubo.com\/sql\/sql-data-types\/","title":{"rendered":"SQL Data Types"},"content":{"rendered":"\n<p>SQL data types define the kind of value a column can hold. Choosing the correct data type is essential for database performance, accuracy, and storage efficiency.<\/p>\n\n\n\n<p>Each SQL database system (MySQL, SQL Server, MS Access, etc.) supports different data types. Always refer to your database documentation for compatibility. In our SQL playground, some data types and advanced features may not be supported, especially those that are platform-specific. If a feature is not supported in our playground, you may see a syntax error.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SQL Data Types MySQL Data Types (Version 8.0)<\/h2>\n\n\n\n<p>In MySQL, data types fall into three broad categories: String, Numeric, and Date\/Time.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">String Data Types<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>CHAR(size)<\/code><\/td><td>Fixed-length string (0\u2013255).<\/td><\/tr><tr><td><code>VARCHAR(size)<\/code><\/td><td>Variable-length string (0\u201365,535).<\/td><\/tr><tr><td><code>TEXT<\/code><\/td><td>Holds up to 65,535 characters.<\/td><\/tr><tr><td><code>TINYTEXT<\/code><\/td><td>Up to 255 characters.<\/td><\/tr><tr><td><code>BLOB<\/code><\/td><td>Binary Large Object (up to 65,535 bytes).<\/td><\/tr><tr><td><code>ENUM(val1,...)<\/code><\/td><td>One value from a list.<\/td><\/tr><tr><td><code>SET(val1,...)<\/code><\/td><td>Zero or more values from a list.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Note:<\/em><\/strong> In our SQL playground, only <code>VARCHAR<\/code>, <code>CHAR<\/code>, and <code>TEXT<\/code> types are reliably supported.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Numeric Data Types<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>TINYINT<\/code><\/td><td>Very small integer (-128 to 127).<\/td><\/tr><tr><td><code>SMALLINT<\/code><\/td><td>Small integer.<\/td><\/tr><tr><td><code>INT<\/code>\/<code>INTEGER<\/code><\/td><td>Standard integer (-2B to 2B).<\/td><\/tr><tr><td><code>BIGINT<\/code><\/td><td>Large integer.<\/td><\/tr><tr><td><code>FLOAT(p)<\/code><\/td><td>Approximate floating point.<\/td><\/tr><tr><td><code>DOUBLE<\/code><\/td><td>Double-precision float.<\/td><\/tr><tr><td><code>DECIMAL(p,s)<\/code><\/td><td>Fixed-point number.<\/td><\/tr><tr><td><code>BOOL<\/code>\/<code>BOOLEAN<\/code><\/td><td>Alias for <code>TINYINT(1)<\/code> (0 = false, 1 = true).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Note:<\/em><\/strong> These are commonly supported in our playground.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Date and Time Data Types<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>DATE<\/code><\/td><td>&#8216;YYYY-MM-DD&#8217;.<\/td><\/tr><tr><td><code>DATETIME<\/code><\/td><td>&#8216;YYYY-MM-DD hh:mm:ss&#8217;.<\/td><\/tr><tr><td><code>TIMESTAMP<\/code><\/td><td>Unix epoch-based time.<\/td><\/tr><tr><td><code>TIME<\/code><\/td><td>Time only.<\/td><\/tr><tr><td><code>YEAR<\/code><\/td><td>Four-digit year.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Note:<\/em><\/strong> <code>DATE<\/code>, <code>DATETIME<\/code>, and <code>TIME<\/code> are supported in our playground. <code>TIMESTAMP<\/code> might behave differently.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SQL Data Types SQL Server Data Types<\/h2>\n\n\n\n<p>SQL Server uses slightly different data types and naming conventions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">String Data Types<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>CHAR(n)<\/code><\/td><td>Fixed-length, non-Unicode.<\/td><\/tr><tr><td><code>VARCHAR(n)<\/code><\/td><td>Variable-length, non-Unicode.<\/td><\/tr><tr><td><code>NCHAR(n)<\/code><\/td><td>Fixed-length Unicode.<\/td><\/tr><tr><td><code>NVARCHAR(n)<\/code><\/td><td>Variable-length Unicode.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Important:<\/em><\/strong> SQL Server\u2013specific types like <code>NVARCHAR<\/code> are not available in our playground.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Numeric Data Types<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>BIT<\/code><\/td><td>0 or 1.<\/td><\/tr><tr><td><code>TINYINT<\/code><\/td><td>0 to 255.<\/td><\/tr><tr><td><code>SMALLINT<\/code><\/td><td>Small integer.<\/td><\/tr><tr><td><code>INT<\/code><\/td><td>Standard integer.<\/td><\/tr><tr><td><code>BIGINT<\/code><\/td><td>Large integer.<\/td><\/tr><tr><td><code>DECIMAL(p,s)<\/code><\/td><td>Exact decimal.<\/td><\/tr><tr><td><code>FLOAT<\/code>, <code>REAL<\/code><\/td><td>Approximate decimals.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Note:<\/em><\/strong> <code>INT<\/code>, <code>FLOAT<\/code>, <code>DECIMAL<\/code>, and <code>BIT<\/code> are supported in the playground.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Date and Time Data Types<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>DATE<\/code><\/td><td>Date only.<\/td><\/tr><tr><td><code>DATETIME<\/code><\/td><td>Date and time.<\/td><\/tr><tr><td><code>SMALLDATETIME<\/code><\/td><td>Less precision.<\/td><\/tr><tr><td><code>TIME<\/code><\/td><td>Time only.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Note:<\/em><\/strong> Precision might vary. Use <code>DATE<\/code>, <code>DATETIME<\/code>, and <code>TIME<\/code> in the playground.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Other Data Types<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>UNIQUEIDENTIFIER<\/code><\/td><td>GUID<\/td><\/tr><tr><td><code>XML<\/code><\/td><td>XML formatted data<\/td><\/tr><tr><td><code>SQL_VARIANT<\/code><\/td><td>Stores various types<\/td><\/tr><tr><td><code>TABLE<\/code>, <code>CURSOR<\/code><\/td><td>Advanced types<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Important:<\/em><\/strong> Not supported in our playground.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SQL Data Types MS Access Data Types<\/h2>\n\n\n\n<p>MS Access uses simpler data types suitable for desktop applications.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Data Type<\/th><th>Description<\/th><\/tr><\/thead><tbody><tr><td><code>Text<\/code><\/td><td>Up to 255 characters.<\/td><\/tr><tr><td><code>Memo<\/code><\/td><td>Long text (up to 65,536 chars).<\/td><\/tr><tr><td><code>Byte<\/code><\/td><td>0 to 255.<\/td><\/tr><tr><td><code>Integer<\/code><\/td><td>-32,768 to 32,767.<\/td><\/tr><tr><td><code>Long<\/code><\/td><td>-2B to 2B.<\/td><\/tr><tr><td><code>Single<\/code>, <code>Double<\/code><\/td><td>Floating point numbers.<\/td><\/tr><tr><td><code>Currency<\/code><\/td><td>Decimal values for money.<\/td><\/tr><tr><td><code>AutoNumber<\/code><\/td><td>Auto-increment field.<\/td><\/tr><tr><td><code>Date\/Time<\/code><\/td><td>Stores both date and time.<\/td><\/tr><tr><td><code>Yes\/No<\/code><\/td><td>Boolean.<\/td><\/tr><tr><td><code>OLE Object<\/code>, <code>Hyperlink<\/code>, <code>Lookup Wizard<\/code><\/td><td>Multimedia or UI fields.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong><em>Note:<\/em><\/strong> MS Access-specific features like <code>AutoNumber<\/code> or <code>OLE Object<\/code> are <strong>not supported<\/strong> in our playground.<\/p>\n<\/blockquote>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">SQL Data Types Labs<\/h2>\n\n\n\n<iframe src=\"https:\/\/www.techkubo.com\/sql-sim.html\" title=\"Try SQL on TechKubo\" width=\"100%\" height=\"500\"><\/iframe>\n","protected":false},"excerpt":{"rendered":"<p>SQL data types define the kind of value a column can hold. Choosing the correct data type is essential for [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-353","post","type-post","status-publish","format-standard","hentry","category-sql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SQL Data Types - SQL Tutorial<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/techkubo.com\/sql\/sql-data-types\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL Data Types - SQL Tutorial\" \/>\n<meta property=\"og:description\" content=\"SQL data types define the kind of value a column can hold. 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