{"id":6451,"date":"2024-03-14T04:17:26","date_gmt":"2024-03-14T04:17:26","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-set-tag-in-mybatis\/"},"modified":"2025-08-02T03:47:17","modified_gmt":"2025-08-02T03:47:17","slug":"what-is-the-usage-of-the-set-tag-in-mybatis","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-set-tag-in-mybatis\/","title":{"rendered":"MyBatis Set Tag: Dynamic SQL Updates"},"content":{"rendered":"<p>In MyBatis, the set tag is used to specify the fields to be updated in an update statement along with their corresponding values. The subtags contained within the set tag will generate a set of comma-separated assignment statements used to update the values of fields in a database record.<\/p>\n<p>For example, consider the following update statement:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">update<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\">\"updateUser\"<\/span> <span class=\"hljs-attr\">parameterType<\/span>=<span class=\"hljs-string\">\"User\"<\/span>&gt;<\/span>\r\n  UPDATE users\r\n  <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">set<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">if<\/span> <span class=\"hljs-attr\">test<\/span>=<span class=\"hljs-string\">\"name != null\"<\/span>&gt;<\/span>\r\n      name = #{name},\r\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">if<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">if<\/span> <span class=\"hljs-attr\">test<\/span>=<span class=\"hljs-string\">\"age != null\"<\/span>&gt;<\/span>\r\n      age = #{age},\r\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">if<\/span>&gt;<\/span>\r\n  <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">set<\/span>&gt;<\/span>\r\n  WHERE id = #{id}\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">update<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<p>In the example above, the &#8216;set&#8217; tag contains two &#8216;if&#8217; conditional subtags that check if the &#8216;name&#8217; and &#8216;age&#8217; fields are empty. If not empty, it will generate corresponding assignment statements. The final update statement is as follows:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">UPDATE<\/span> users\r\n<span class=\"hljs-keyword\">SET<\/span>\r\n  name <span class=\"hljs-operator\">=<\/span> #{name},\r\n  age <span class=\"hljs-operator\">=<\/span> #{age}\r\n<span class=\"hljs-keyword\">WHERE<\/span> id <span class=\"hljs-operator\">=<\/span> #{id}\r\n<\/code><\/pre>\n<p>We can use the set tag to dynamically generate update statements based on the input parameters, allowing for flexible update operations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In MyBatis, the set tag is used to specify the fields to be updated in an update statement along with their corresponding values. The subtags contained within the set tag will generate a set of comma-separated assignment statements used to update the values of fields in a database record. For example, consider the following update [&hellip;]<\/p>\n","protected":false},"author":10,"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":[1467,1459,2742,7781,1846],"class_list":["post-6451","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-dynamic-sql","tag-mybatis","tag-mybatis-tutorial","tag-set-tag","tag-update-statement"],"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>MyBatis Set Tag: Dynamic SQL Updates - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to use MyBatis set tag for dynamic SQL updates with examples and best practices.\" \/>\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.silicloud.com\/blog\/what-is-the-usage-of-the-set-tag-in-mybatis\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MyBatis Set Tag: Dynamic SQL Updates\" \/>\n<meta property=\"og:description\" content=\"Learn how to use MyBatis set tag for dynamic SQL updates with examples and best practices.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-set-tag-in-mybatis\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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