{"id":79634,"date":"2024-10-16T13:24:17","date_gmt":"2024-10-16T05:24:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/79634\/"},"modified":"2024-10-16T13:24:17","modified_gmt":"2024-10-16T05:24:17","slug":"mysql%e6%8c%87%e4%bb%a4-rtrim%ef%bc%88%e5%8e%bb%e5%8f%b3%e5%81%b4%e7%a9%ba%e6%a0%bc%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/79634\/","title":{"rendered":"MySQL\u6307\u4ee4: RTRIM()\uff08\u53bb\u53f3\u5074\u7a7a\u683c\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-rtrim%ef%bc%88%e5%8e%bb%e5%8f%b3%e5%81%b4%e7%a9%ba%e6%a0%bc%ef%bc%89-GlIJVZtRtm\">MySQL\u6307\u4ee4: RTRIM()\uff08\u53bb\u53f3\u5074\u7a7a\u683c\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u7684\u6574\u6f54\u6027\u548c\u4e00\u81f4\u6027\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u7576\u6211\u5011\u8655\u7406\u5b57\u7b26\u4e32\u6578\u64da\u6642\uff0c\u7d93\u5e38\u6703\u9047\u5230\u591a\u9918\u7684\u7a7a\u683c\uff0c\u7279\u5225\u662f\u5728\u5b57\u7b26\u4e32\u7684\u53f3\u5074\u3002\u9019\u4e9b\u591a\u9918\u7684\u7a7a\u683c\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u7684\u7d50\u679c\uff0c\u5c0e\u81f4\u4e0d\u5fc5\u8981\u7684\u932f\u8aa4\u3002\u70ba\u4e86\u89e3\u6c7a\u9019\u500b\u554f\u984c\uff0cMySQL\u63d0\u4f9b\u4e86\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u51fd\u6578\u2014\u2014<code>RTRIM()<\/code>\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afrtrim%e5%87%bd%e6%95%b8%ef%bc%9f-GlIJVZtRtm\">\u4ec0\u9ebc\u662fRTRIM()\u51fd\u6578\uff1f<\/h2>\n<p><code>RTRIM()<\/code>\u51fd\u6578\u662fMySQL\u4e2d\u7684\u4e00\u500b\u5b57\u7b26\u4e32\u51fd\u6578\uff0c\u7528\u65bc\u53bb\u9664\u5b57\u7b26\u4e32\u53f3\u5074\u7684\u7a7a\u683c\u3002\u9019\u500b\u51fd\u6578\u7684\u8a9e\u6cd5\u975e\u5e38\u7c21\u55ae\uff1a<\/p>\n<pre><code>RTRIM(string)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>string<\/code>\u662f\u8981\u8655\u7406\u7684\u5b57\u7b26\u4e32\u3002\u7576\u4f60\u8abf\u7528\u9019\u500b\u51fd\u6578\u6642\uff0c\u5b83\u6703\u8fd4\u56de\u4e00\u500b\u53bb\u9664\u4e86\u53f3\u5074\u7a7a\u683c\u7684\u65b0\u5b57\u7b26\u4e32\u3002<\/p>\n<h2 id=\"rtrim%e7%9a%84%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-GlIJVZtRtm\">RTRIM()\u7684\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528<code>RTRIM()<\/code>\u51fd\u6578\u7684\u7bc4\u4f8b\uff0c\u5e6b\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u5b83\u7684\u61c9\u7528\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1%ef%bc%9a%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-GlIJVZtRtm\">\u7bc4\u4f8b1\uff1a\u57fa\u672c\u7528\u6cd5<\/h3>\n<pre><code>SELECT RTRIM('Hello World   ');<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de<code>'Hello World'<\/code>\uff0c\u56e0\u70ba\u53f3\u5074\u7684\u7a7a\u683c\u5df2\u88ab\u53bb\u9664\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2%ef%bc%9a%e5%9c%a8%e8%a1%a8%e6%a0%bc%e4%b8%ad%e4%bd%bf%e7%94%a8rtrim-GlIJVZtRtm\">\u7bc4\u4f8b2\uff1a\u5728\u8868\u683c\u4e2d\u4f7f\u7528RTRIM()<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>users<\/code>\u7684\u8868\u683c\uff0c\u5176\u4e2d\u6709\u4e00\u500b\u540d\u70ba<code>username<\/code>\u7684\u5217\uff0c\u53ef\u80fd\u5305\u542b\u591a\u9918\u7684\u7a7a\u683c\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528<code>RTRIM()<\/code>\u4f86\u67e5\u8a62\u53bb\u9664\u7a7a\u683c\u7684\u7528\u6236\u540d\uff1a<\/p>\n<pre><code>SELECT RTRIM(username) AS trimmed_username FROM users;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5c31\u80fd\u7372\u5f97\u4e00\u500b\u53bb\u9664\u4e86\u53f3\u5074\u7a7a\u683c\u7684\u7528\u6236\u540d\u5217\u8868\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b3%ef%bc%9a%e6%9b%b4%e6%96%b0%e8%a1%a8%e6%a0%bc%e4%b8%ad%e7%9a%84%e6%95%b8%e6%93%9a-GlIJVZtRtm\">\u7bc4\u4f8b3\uff1a\u66f4\u65b0\u8868\u683c\u4e2d\u7684\u6578\u64da<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u6c38\u4e45\u53bb\u9664<code>users<\/code>\u8868\u4e2d\u6240\u6709\u7528\u6236\u540d\u7684\u53f3\u5074\u7a7a\u683c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u66f4\u65b0\u8a9e\u53e5\uff1a<\/p>\n<pre><code>UPDATE users SET username = RTRIM(username);<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u6703\u66f4\u65b0<code>username<\/code>\u5217\uff0c\u5c07\u6240\u6709\u7528\u6236\u540d\u7684\u53f3\u5074\u7a7a\u683c\u53bb\u9664\u3002<\/p>\n<h2 id=\"rtrim%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-GlIJVZtRtm\">RTRIM()\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136<code>RTRIM()<\/code>\u51fd\u6578\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4ecd\u9700\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li><strong>\u6027\u80fd\u8003\u91cf\uff1a<\/strong>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u4f7f\u7528<code>RTRIM()<\/code>\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u66f4\u65b0\u64cd\u4f5c\u4e2d\u3002<\/li>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u5728\u66f4\u65b0\u6578\u64da\u4e4b\u524d\uff0c\u5efa\u8b70\u5148\u5099\u4efd\u6578\u64da\uff0c\u4ee5\u9632\u6b62\u610f\u5916\u522a\u9664\u91cd\u8981\u4fe1\u606f\u3002<\/li>\n<li><strong>\u8207\u5176\u4ed6\u51fd\u6578\u7d50\u5408\u4f7f\u7528\uff1a<\/strong>\u53ef\u4ee5\u5c07<code>RTRIM()<\/code>\u8207\u5176\u4ed6\u5b57\u7b26\u4e32\u51fd\u6578\u7d50\u5408\u4f7f\u7528\uff0c\u5982<code>LTRIM()<\/code>\uff08\u53bb\u5de6\u5074\u7a7a\u683c\uff09\u548c<code>TRIM()<\/code>\uff08\u53bb\u5169\u5074\u7a7a\u683c\uff09\uff0c\u4ee5\u9054\u5230\u66f4\u597d\u7684\u6548\u679c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-GlIJVZtRtm\">\u7e3d\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c<code>RTRIM()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u6709\u6548\u5730\u8655\u7406\u5b57\u7b26\u4e32\u6578\u64da\u4e2d\u7684\u591a\u9918\u7a7a\u683c\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u9019\u500b\u51fd\u6578\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u6574\u6f54\u6027\u548c\u67e5\u8a62\u7684\u6e96\u78ba\u6027\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u4f60\u7684\u6578\u64da\u5eab\u9700\u6c42\uff0c\u78ba\u4fdd\u4f60\u7684\u61c9\u7528\u7a0b\u5e8f\u904b\u884c\u6d41\u66a2\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6307\u4ee4RTRIM()\uff0c\u7528\u65bc\u53bb\u9664\u5b57\u4e32\u53f3\u5074\u7684\u7a7a\u683c\uff0c\u63d0\u5347\u8cc7\u6599\u8655\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u6574\u6f54\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-79634","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=79634"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79634\/revisions"}],"predecessor-version":[{"id":79635,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/79634\/revisions\/79635"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=79634"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=79634"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=79634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}