{"id":1000,"date":"2016-07-19T09:35:45","date_gmt":"2016-07-19T09:35:45","guid":{"rendered":"https:\/\/sqltutorial.org\/?page_id=1000"},"modified":"2025-03-16T23:22:08","modified_gmt":"2025-03-17T06:22:08","slug":"sql-atan","status":"publish","type":"page","link":"https:\/\/www.sqltutorial.org\/sql-math-functions\/sql-atan\/","title":{"rendered":"SQL ATAN Function"},"content":{"rendered":"\n<p>The SQL <code>ATAN<\/code> function returns an arc tangent of an input argument.<\/p>\n\n\n\n<p>In math, the arctangent(x) is the inverse of tangent of x when x is a real number.<\/p>\n\n\n\n<p>If<\/p>\n\n\n\n<p>tan y = x<\/p>\n\n\n\n<p>Then<\/p>\n\n\n\n<p>arctan<i>x<\/i>= tan<sup>-1<\/sup><i> x<\/i> = <i>y<\/i><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='syntax'>Syntax <a href=\"#syntax\" class=\"anchor\" id=\"syntax\" title=\"Anchor for Syntax\">#<\/a><\/h2>\n\n\n\n<p>The following shows the syntax of the <code>ATAN<\/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\">ATAN(x)<\/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<h2 class=\"wp-block-heading\" id='argument'>Argument <a href=\"#argument\" class=\"anchor\" id=\"argument\" title=\"Anchor for Argument\">#<\/a><\/h2>\n\n\n\n<p>The <code>ATAN<\/code> function accepts an argument&nbsp;<code>x<\/code><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='return'>Return <a href=\"#return\" class=\"anchor\" id=\"return\" title=\"Anchor for Return\">#<\/a><\/h2>\n\n\n\n<p>The <code>ATAN<\/code> function returns the arc tangent of x, i.e., &nbsp;the value whose tangent is <code>x<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id='examples'>Examples <a href=\"#examples\" class=\"anchor\" id=\"examples\" title=\"Anchor for Examples\">#<\/a><\/h2>\n\n\n\n<p>The following example\u00a0shows how to use the <code>ATAN<\/code> function to calculate the arc tangent of <code>0.5<\/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\">SELECT<\/span> <span class=\"hljs-keyword\">ATAN<\/span>(<span class=\"hljs-number\">0.5<\/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>Output:<\/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\">       atan\n<span class=\"hljs-comment\">-------------------<\/span>\n 0.463647609000806\n(1 row)<\/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>Most database systems support the <code>ATAN<\/code> function.<\/p>\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 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In math, the arctangent(x) is the inverse of tangent of x when x is a real number. If tan y = x Then arctanx= tan-1 x = y Syntax # The following shows the syntax of the ATAN function. Argument # The ATAN [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1083,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-1000","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 ATAN: Calculate Arc Tangent<\/title>\n<meta name=\"description\" content=\"This tutorial shows you how to use the SQL ATAN function that returns an arc tangent of an input argument.\" \/>\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-math-functions\/sql-atan\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SQL ATAN: Calculate Arc Tangent\" 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