{"id":12232,"date":"2024-03-14T15:24:52","date_gmt":"2024-03-14T15:24:52","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/the-convert-function-method-in-sql\/"},"modified":"2025-08-04T23:04:36","modified_gmt":"2025-08-04T23:04:36","slug":"the-convert-function-method-in-sql","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/the-convert-function-method-in-sql\/","title":{"rendered":"SQL CONVERT Function Guide"},"content":{"rendered":"<p>In SQL, the CONVERT() function is used to change one data type to another. It can be used to convert strings to numbers, dates, or other data types, as well as converting numbers, dates, or other data types to strings.<\/p>\n<p>The syntax for the CONVERT() function is as follows:<\/p>\n<pre class=\"post-pre\"><code>CONVERT(data_type, expression, [style])\r\n<\/code><\/pre>\n<p>In this case, data_type is the target data type to be converted, expression is the expression to be converted, and style is an optional parameter used to specify the conversion style.<\/p>\n<p>Below are some common usage examples:<\/p>\n<ol>\n<li>Convert the string to an integer.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">SELECT<\/span> <span class=\"hljs-keyword\">CONVERT<\/span>(<span class=\"hljs-type\">INT<\/span>, <span class=\"hljs-string\">'123'<\/span>) <span class=\"hljs-keyword\">AS<\/span> ConvertedValue;\r\n<\/code><\/pre>\n<p>The result is:<\/p>\n<pre class=\"post-pre\"><code>ConvertedValue\r\n--------------\r\n123\r\n<\/code><\/pre>\n<ol>\n<li>Convert the date string to a date type.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">SELECT<\/span> <span class=\"hljs-keyword\">CONVERT<\/span>(<span class=\"hljs-type\">DATE<\/span>, <span class=\"hljs-string\">'2022-01-01'<\/span>) <span class=\"hljs-keyword\">AS<\/span> ConvertedDate;\r\n<\/code><\/pre>\n<p>The result is:<\/p>\n<pre class=\"post-pre\"><code>ConvertedDate\r\n-------------\r\n2022-01-01\r\n<\/code><\/pre>\n<ol>\n<li>Convert the numbers to strings.<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">SELECT<\/span> <span class=\"hljs-keyword\">CONVERT<\/span>(<span class=\"hljs-type\">VARCHAR<\/span>(<span class=\"hljs-number\">10<\/span>), <span class=\"hljs-number\">123<\/span>) <span class=\"hljs-keyword\">AS<\/span> ConvertedString;\r\n<\/code><\/pre>\n<p>The result is:<\/p>\n<pre class=\"post-pre\"><code>ConvertedString\r\n---------------\r\n123\r\n<\/code><\/pre>\n<p>These are just a few common usage examples of the CONVERT() function, which can also be used for other types of conversions such as converting strings to times, dates to strings, and so on. When using it, you can adjust the data type and style parameters according to your needs.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In SQL, the CONVERT() function is used to change one data type to another. It can be used to convert strings to numbers, dates, or other data types, as well as converting numbers, dates, or other data types to strings. The syntax for the CONVERT() function is as follows: CONVERT(data_type, expression, [style]) In this case, [&hellip;]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[571,415,284,125,765],"class_list":["post-12232","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-convert-function","tag-data-types","tag-database","tag-sql","tag-sql-functions"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SQL CONVERT Function Guide - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Master SQL&#039;s CONVERT() function for data type conversions. 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