{"id":20494,"date":"2025-11-05T10:40:05","date_gmt":"2025-11-05T05:10:05","guid":{"rendered":"https:\/\/vinish.dev\/?p=20494"},"modified":"2025-11-05T10:40:06","modified_gmt":"2025-11-05T05:10:06","slug":"oracle-atan-function","status":"publish","type":"post","link":"https:\/\/vinish.dev\/oracle-atan-function","title":{"rendered":"Oracle ATAN Function: A Simple Guide"},"content":{"rendered":"\n<p>The <code>ATAN<\/code> function in <a href=\"https:\/\/vinish.dev\/category\/oracle-sql\">Oracle SQL<\/a> is a trigonometric function that stands for <strong>Arc Tangent<\/strong>. It is the opposite of the <code>TAN<\/code> (Tangent) function. While <code>TAN<\/code> takes an angle and gives you a ratio, <code>ATAN<\/code> takes a ratio (which can be any number) and gives you back the angle.<\/p>\n\n\n\n<p>The angle is returned in <strong>radians<\/strong>, which is the standard mathematical way to measure angles (as opposed to degrees).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What is the ATAN Function in Oracle?<\/h2>\n\n\n\n<p>The <code>ATAN<\/code> function is used to find the angle whose tangent is a given number.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Input Range:<\/strong> The input number <code>n<\/code> can be any number (it is unbounded).<\/li>\n\n\n\n<li><strong>Output Range:<\/strong> The function returns the angle as a number in radians, which will always be between <code>-pi\/2<\/code> and <code>pi\/2<\/code> (approximately -1.5708 to 1.5708).<\/li>\n<\/ul>\n\n\n\n<p>This function is typically used in engineering, scientific, and mathematical calculations where you need to solve for an angle based on a known tangent ratio.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">ATAN Function Syntax<\/h2>\n\n\n\n<p>The syntax for <code>ATAN<\/code> is very simple:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ATAN(n)\n<\/code><\/pre>\n\n\n\n<p>Let's break that down:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><code>n<\/code><\/strong>: The number (or numeric column) for which you want to find the arc tangent.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Oracle ATAN Function Examples<\/h2>\n\n\n\n<p>Here are two practical examples of how to use <code>ATAN<\/code>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Example 1: Finding the Arc Tangent of 1<\/h3>\n\n\n\n<p>In trigonometry, the tangent of a 45-degree angle is 1. In radians, 45 degrees is <code>pi \/ 4<\/code> (approx 0.785). Let's see what <code>ATAN<\/code> returns.<\/p>\n\n\n\n<p><strong>Query:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \n  ATAN(1) AS \"ArcTangent_of_1\"\nFROM DUAL;\n<\/code><\/pre>\n\n\n\n<p><strong>Result:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ArcTangent_of_1\n---------------\n     .785398163\n<\/code><\/pre>\n\n\n\n<p><em>This is the angle (in radians) whose tangent is 1.<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Example 2: Finding the Arc Tangent of 0<\/h3>\n\n\n\n<p>The tangent of a 0-degree angle is 0.<\/p>\n\n\n\n<p><strong>Query:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT \n  ATAN(0) AS \"ArcTangent_of_0\"\nFROM DUAL;\n<\/code><\/pre>\n\n\n\n<p><strong>Result:<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ArcTangent_of_0\n---------------\n              0\n<\/code><\/pre>\n\n\n\n<p><em>This is the angle (in radians) whose tangent is 0.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The ATAN function in Oracle SQL is a trigonometric function that stands for Arc Tangent. It is the opposite of the TAN (Tangent) function. While TAN takes an angle and gives you a ratio, ATAN takes a ratio (which can be any number) and gives you back the angle. The angle is returned in radians, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1825,1807],"tags":[1822],"class_list":["post-20494","post","type-post","status-publish","format-standard","hentry","category-numeric-function","category-oracle-sql","tag-ai-assisted"],"blocksy_meta":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Oracle ATAN Function: A Simple Guide &#8226; Vinish.Dev<\/title>\n<meta name=\"description\" content=\"Learn to use the Oracle ATAN function to find the arc tangent of a number. 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