{"id":873,"date":"2019-06-13T20:52:02","date_gmt":"2019-06-14T04:52:02","guid":{"rendered":"https:\/\/db2tutorial.com\/?page_id=873"},"modified":"2020-04-11T06:57:46","modified_gmt":"2020-04-11T14:57:46","slug":"db2-left","status":"publish","type":"page","link":"https:\/\/www.db2tutorial.com\/db2-string-functions\/db2-left\/","title":{"rendered":"Db2 LEFT"},"content":{"rendered":"\n<p>Db2 <code>LEFT()<\/code> function returns a substring that consists of a specified number of leftmost characters from a string.<\/p>\n\n\n\n<p>Here is the syntax of the <code>LEFT()<\/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\">LEFT(string, length);<\/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\"><li>First, specify the source string ( <code>string<\/code>) from which to extract the substring.<\/li><li>Second, specify the number of leftmost characters ( <code>length<\/code>) to be extracted.<\/li><\/ul>\n\n\n\n<p>This example returns the first three characters of the string <code>'IBM Db2'<\/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> \n   <span class=\"hljs-keyword\">LEFT<\/span>(<span class=\"hljs-string\">'IBM Db2'<\/span>,<span class=\"hljs-number\">3<\/span>) <span class=\"hljs-keyword\">result<\/span>\n<span class=\"hljs-keyword\">FROM<\/span> \n   sysibm.sysdummy1;<\/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>The following shows the 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\">RESULT  \n<span class=\"hljs-comment\">------- <\/span>\nIBM<\/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>See the following <code>authors<\/code> tables from the <a href=\"https:\/\/db2tutorial.com\/getting-started\/db2-sample-database\/\">sample database<\/a>:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"194\" height=\"131\" src=\"https:\/\/db2tutorial.com\/wp-content\/uploads\/2019\/03\/authors.png\" alt=\"authors\" class=\"wp-image-82\"\/><\/figure>\n\n\n\n<p>This example uses the <code>LEFT()<\/code> function shows the number of the last names for each initial (A, B, C&#8230;):<\/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\">SELECT<\/span> \n   <span class=\"hljs-keyword\">LEFT<\/span>(last_name,<span class=\"hljs-number\">1<\/span>) <span class=\"hljs-keyword\">Initial<\/span>, \n   <span class=\"hljs-keyword\">COUNT<\/span>(last_name)\n<span class=\"hljs-keyword\">FROM<\/span> <span class=\"hljs-keyword\">authors<\/span>\n<span class=\"hljs-keyword\">GROUP<\/span> <span class=\"hljs-keyword\">BY<\/span> \n   <span class=\"hljs-keyword\">LEFT<\/span>(last_name,<span class=\"hljs-number\">1<\/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>The output is as follows:<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"132\" height=\"337\" src=\"https:\/\/db2tutorial.com\/wp-content\/uploads\/2019\/06\/db2-left-function.png\" alt=\"db2 left function\" class=\"wp-image-874\" srcset=\"https:\/\/www.db2tutorial.com\/wp-content\/uploads\/2019\/06\/db2-left-function.png 132w, https:\/\/www.db2tutorial.com\/wp-content\/uploads\/2019\/06\/db2-left-function-118x300.png 118w\" sizes=\"auto, (max-width: 132px) 100vw, 132px\" \/><\/figure>\n\n\n\n<p>In this tutorial, you have learned how to use the Db2 <code>LEFT()<\/code> function to return the number of leftmost characters of a string.<\/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 class=\"wth-thumbs\">\n\t\t\t<button\n\t\t\t\tdata-post=\"873\"\n\t\t\t\tdata-post-url=\"https:\/\/www.db2tutorial.com\/db2-string-functions\/db2-left\/\"\n\t\t\t\tdata-post-title=\"Db2 LEFT\"\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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string.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":653,"menu_order":4,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-873","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>Db2 LEFT() Function By Examples<\/title>\n<meta name=\"description\" content=\"Db2 LEFT() function returns a string that consists of a specified number of leftmost characters of a string.\" \/>\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.db2tutorial.com\/db2-string-functions\/db2-left\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Db2 LEFT() Function By Examples\" \/>\n<meta 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