{"id":80060,"date":"2024-10-16T13:52:14","date_gmt":"2024-10-16T05:52:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/80060\/"},"modified":"2024-10-16T13:52:14","modified_gmt":"2024-10-16T05:52:14","slug":"mysql%e6%8c%87%e4%bb%a4-trim%ef%bc%88%e5%8e%bb%e9%99%a4%e7%a9%ba%e6%a0%bc%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/80060\/","title":{"rendered":"MySQL\u6307\u4ee4: TRIM()\uff08\u53bb\u9664\u7a7a\u683c\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-trim%ef%bc%88%e5%8e%bb%e9%99%a4%e7%a9%ba%e6%a0%bc%ef%bc%89-EGrcTAUOAE\">MySQL\u6307\u4ee4: TRIM()\uff08\u53bb\u9664\u7a7a\u683c\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u81f3\u95dc\u91cd\u8981\u3002\u7576\u6211\u5011\u8655\u7406\u5b57\u7b26\u4e32\u6578\u64da\u6642\uff0c\u7d93\u5e38\u6703\u9047\u5230\u591a\u9918\u7684\u7a7a\u683c\u554f\u984c\u3002\u9019\u4e9b\u7a7a\u683c\u53ef\u80fd\u4f86\u81ea\u7528\u6236\u8f38\u5165\u3001\u6578\u64da\u5c0e\u5165\u6216\u5176\u4ed6\u4f86\u6e90\uff0c\u6703\u5f71\u97ff\u67e5\u8a62\u7d50\u679c\u548c\u6578\u64da\u8655\u7406\u3002MySQL\u63d0\u4f9b\u4e86\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u51fd\u6578\u2014\u2014<code>TRIM()<\/code>\uff0c\u7528\u65bc\u53bb\u9664\u5b57\u7b26\u4e32\u524d\u5f8c\u7684\u7a7a\u683c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e<code>TRIM()<\/code>\u51fd\u6578\u7684\u7528\u6cd5\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"trim%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-EGrcTAUOAE\">TRIM()\u51fd\u6578\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n<p><code>TRIM()<\/code>\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>TRIM([remstr] FROM str)<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>str<\/code>\u662f\u8981\u8655\u7406\u7684\u5b57\u7b26\u4e32\uff0c\u800c<code>remstr<\/code>\u662f\u53ef\u9078\u7684\u53c3\u6578\uff0c\u6307\u5b9a\u8981\u53bb\u9664\u7684\u5b57\u7b26\uff0c\u9ed8\u8a8d\u70ba\u7a7a\u683c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b1%ef%bc%9a%e5%8e%bb%e9%99%a4%e7%a9%ba%e6%a0%bc-EGrcTAUOAE\">\u793a\u4f8b1\uff1a\u53bb\u9664\u7a7a\u683c<\/h3>\n<pre><code>SELECT TRIM('   Hello World!   ');<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u8fd4\u56de\u7684\u7d50\u679c\u5c07\u662f<code>Hello World!<\/code>\uff0c\u524d\u5f8c\u7684\u7a7a\u683c\u88ab\u6210\u529f\u53bb\u9664\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b2%ef%bc%9a%e5%8e%bb%e9%99%a4%e7%89%b9%e5%ae%9a%e5%ad%97%e7%ac%a6-EGrcTAUOAE\">\u793a\u4f8b2\uff1a\u53bb\u9664\u7279\u5b9a\u5b57\u7b26<\/h3>\n<p>\u9664\u4e86\u53bb\u9664\u7a7a\u683c\uff0c<code>TRIM()<\/code>\u9084\u53ef\u4ee5\u7528\u4f86\u53bb\u9664\u5176\u4ed6\u5b57\u7b26\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT TRIM('x' FROM 'xxxHello World!xxx');<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de<code>Hello World!<\/code>\uff0c\u56e0\u70ba\u6240\u6709\u7684<code>x<\/code>\u5b57\u7b26\u90fd\u88ab\u53bb\u9664\u4e86\u3002<\/p>\n<h2 id=\"trim%e5%87%bd%e6%95%b8%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-EGrcTAUOAE\">TRIM()\u51fd\u6578\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c<code>TRIM()<\/code>\u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u591a\u7a2e\u5834\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u6e05\u7406\uff1a<\/strong>\u5728\u5c0e\u5165\u6578\u64da\u6642\uff0c\u7d93\u5e38\u6703\u9047\u5230\u591a\u9918\u7684\u7a7a\u683c\uff0c\u4f7f\u7528<code>TRIM()<\/code>\u53ef\u4ee5\u6709\u6548\u6e05\u7406\u9019\u4e9b\u6578\u64da\u3002<\/li>\n<li><strong>\u67e5\u8a62\u512a\u5316\uff1a<\/strong>\u5728\u9032\u884c\u5b57\u7b26\u4e32\u6bd4\u8f03\u6642\uff0c\u53bb\u9664\u7a7a\u683c\u53ef\u4ee5\u907f\u514d\u56e0\u70ba\u7a7a\u683c\u800c\u5c0e\u81f4\u7684\u67e5\u8a62\u5931\u6557\u3002<\/li>\n<li><strong>\u7528\u6236\u8f38\u5165\u8655\u7406\uff1a<\/strong>\u5728\u8655\u7406\u7528\u6236\u8f38\u5165\u7684\u6578\u64da\u6642\uff0c\u4f7f\u7528<code>TRIM()<\/code>\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"trim%e5%87%bd%e6%95%b8%e7%9a%84%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-EGrcTAUOAE\">TRIM()\u51fd\u6578\u7684\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u96d6\u7136<code>TRIM()<\/code>\u51fd\u6578\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u7279\u5225\u662f\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\u9032\u884c\u67e5\u8a62\u6642\uff0c\u5efa\u8b70\u5728\u6578\u64da\u5c0e\u5165\u968e\u6bb5\u5c31\u9032\u884c\u6e05\u7406\uff0c\u4ee5\u6e1b\u5c11\u67e5\u8a62\u6642\u7684\u8ca0\u64d4\u3002\u6b64\u5916\uff0c\u5c0d\u65bc\u983b\u7e41\u4f7f\u7528\u7684\u5b57\u6bb5\uff0c\u53ef\u4ee5\u8003\u616e\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u968e\u6bb5\u5c31\u9032\u884c\u9069\u7576\u7684\u7d04\u675f\uff0c\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u7a7a\u683c\u51fa\u73fe\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-EGrcTAUOAE\">\u7d50\u8ad6<\/h2>\n<p>\u7e3d\u4e4b\uff0c<code>TRIM()<\/code>\u51fd\u6578\u5728MySQL\u4e2d\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u6709\u6548\u5730\u8655\u7406\u5b57\u7b26\u4e32\u6578\u64da\u4e2d\u7684\u7a7a\u683c\u554f\u984c\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u6e05\u7406\u3001\u67e5\u8a62\u512a\u5316\u9084\u662f\u7528\u6236\u8f38\u5165\u8655\u7406\u65b9\u9762\uff0c<code>TRIM()<\/code>\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u4e86\u89e3\u4e26\u5584\u7528\u9019\u500b\u51fd\u6578\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc<code>TRIM()<\/code>\u51fd\u6578\u6216\u5176\u4ed6MySQL\u6307\u4ee4\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6709\u95dc\u65bc<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u548c<code><a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u7684\u5167\u5bb9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684TRIM()\u51fd\u6570\uff0c\u8f7b\u677e\u53bb\u9664\u5b57\u7b26\u4e32\u524d\u540e\u7684\u7a7a\u683c\uff0c\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\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-80060","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80060","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=80060"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80060\/revisions"}],"predecessor-version":[{"id":80061,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/80060\/revisions\/80061"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=80060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=80060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=80060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}