{"id":76156,"date":"2024-10-16T04:19:18","date_gmt":"2024-10-15T20:19:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76156\/"},"modified":"2024-10-16T04:19:18","modified_gmt":"2024-10-15T20:19:18","slug":"mysql%e6%b8%85%e9%99%a4%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a6%96%e5%b0%be%e7%a9%ba%e6%a0%bc%e5%87%bd%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76156\/","title":{"rendered":"MySQL\u6e05\u9664\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u683c\u51fd\u6578"},"content":{"rendered":"<h1 id=\"mysql%e6%b8%85%e9%99%a4%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a6%96%e5%b0%be%e7%a9%ba%e6%a0%bc%e5%87%bd%e6%95%b8-xDjCWgEkCQ\">MySQL\u6e05\u9664\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u683c\u51fd\u6578<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u5b57\u7b26\u4e32\u7684\u8655\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4e00\u74b0\u3002\u7279\u5225\u662f\u5728\u4f7f\u7528MySQL\u6642\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u5b57\u7b26\u4e32\u9032\u884c\u6e05\u7406\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0eMySQL\u4e2d\u6e05\u9664\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u683c\u7684\u51fd\u6578\u53ca\u5176\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e6%b8%85%e9%99%a4%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%a6%96%e5%b0%be%e7%a9%ba%e6%a0%bc-xDjCWgEkCQ\">\u70ba\u4ec0\u9ebc\u9700\u8981\u6e05\u9664\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u683c<\/h2>\n<p>\u5728\u6578\u64da\u8f38\u5165\u904e\u7a0b\u4e2d\uff0c\u4f7f\u7528\u8005\u53ef\u80fd\u6703\u4e0d\u5c0f\u5fc3\u5728\u5b57\u7b26\u4e32\u7684\u958b\u982d\u6216\u7d50\u5c3e\u6dfb\u52a0\u7a7a\u683c\u3002\u9019\u4e9b\u591a\u9918\u7684\u7a7a\u683c\u4e0d\u50c5\u6703\u5f71\u97ff\u6578\u64da\u7684\u67e5\u8a62\u548c\u6bd4\u8f03\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u6578\u64da\u5eab\u4e2d\u7684\u5197\u9918\u6578\u64da\u3002\u6e05\u9664\u9019\u4e9b\u7a7a\u683c\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u8cea\u91cf\uff0c\u4e26\u78ba\u4fdd\u67e5\u8a62\u7684\u6e96\u78ba\u6027\u3002<\/p>\n<h2 id=\"mysql%e4%b8%ad%e7%9a%84trim%e5%87%bd%e6%95%b8-xDjCWgEkCQ\">MySQL\u4e2d\u7684TRIM\u51fd\u6578<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u6e05\u9664\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u683c\u7684\u4e3b\u8981\u51fd\u6578\u662f<code>TRIM()<\/code>\u3002\u9019\u500b\u51fd\u6578\u53ef\u4ee5\u53bb\u9664\u5b57\u7b26\u4e32\u958b\u982d\u548c\u7d50\u5c3e\u7684\u7a7a\u683c\uff0c\u4e26\u8fd4\u56de\u8655\u7406\u5f8c\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n<h3 id=\"trim%e5%87%bd%e6%95%b8%e7%9a%84%e8%aa%9e%e6%b3%95-xDjCWgEkCQ\">TRIM\u51fd\u6578\u7684\u8a9e\u6cd5<\/h3>\n<pre><code>TRIM([LEADING | TRAILING | BOTH] [remstr] FROM str)<\/code><\/pre>\n<ul>\n<li><code>LEADING<\/code>\uff1a\u53bb\u9664\u958b\u982d\u7684\u7a7a\u683c\u3002<\/li>\n<li><code>TRAILING<\/code>\uff1a\u53bb\u9664\u7d50\u5c3e\u7684\u7a7a\u683c\u3002<\/li>\n<li><code>BOTH<\/code>\uff1a\u53bb\u9664\u958b\u982d\u548c\u7d50\u5c3e\u7684\u7a7a\u683c\uff08\u9ed8\u8a8d\u9078\u9805\uff09\u3002<\/li>\n<li><code>remstr<\/code>\uff1a\u8981\u53bb\u9664\u7684\u5b57\u7b26\uff0c\u9ed8\u8a8d\u70ba\u7a7a\u683c\u3002<\/li>\n<li><code>str<\/code>\uff1a\u8981\u8655\u7406\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-xDjCWgEkCQ\">\u4f7f\u7528\u7bc4\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528<code>TRIM()<\/code>\u51fd\u6578\u7684\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>SELECT TRIM('   Hello World!   ');<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de<code>'Hello World!'<\/code>\uff0c\u53bb\u9664\u4e86\u958b\u982d\u548c\u7d50\u5c3e\u7684\u7a7a\u683c\u3002<\/p>\n<pre><code>SELECT TRIM(LEADING 'x' FROM 'xxxHello World!xxx');<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de<code>'Hello World!xxx'<\/code>\uff0c\u53bb\u9664\u4e86\u958b\u982d\u7684\u5b57\u7b26<code>'x'<\/code>\u3002<\/p>\n<pre><code>SELECT TRIM(TRAILING 'x' FROM 'xxxHello World!xxx');<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de<code>'xxxHello World!'<\/code>\uff0c\u53bb\u9664\u4e86\u7d50\u5c3e\u7684\u5b57\u7b26<code>'x'<\/code>\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-xDjCWgEkCQ\">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\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u6e05\u7406\uff1a\u5728\u5c0e\u5165\u6578\u64da\u4e4b\u524d\uff0c\u4f7f\u7528<code>TRIM()<\/code>\u51fd\u6578\u6e05\u7406\u591a\u9918\u7684\u7a7a\u683c\u3002<\/li>\n<li>\u67e5\u8a62\u512a\u5316\uff1a\u5728\u67e5\u8a62\u6642\uff0c\u78ba\u4fdd\u6bd4\u8f03\u7684\u5b57\u7b26\u4e32\u4e0d\u53d7\u7a7a\u683c\u5f71\u97ff\u3002<\/li>\n<li>\u7528\u6236\u8f38\u5165\u9a57\u8b49\uff1a\u5728\u8655\u7406\u7528\u6236\u8f38\u5165\u6642\uff0c\u53bb\u9664\u4e0d\u5fc5\u8981\u7684\u7a7a\u683c\u4ee5\u63d0\u9ad8\u7528\u6236\u9ad4\u9a57\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-xDjCWgEkCQ\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u4e2d\u7684<code>TRIM()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u6e05\u7406\u5b57\u7b26\u4e32\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\u8cea\u91cf\u548c\u67e5\u8a62\u7684\u6e96\u78ba\u6027\u3002\u5728\u65e5\u5e38\u7684\u6578\u64da\u8655\u7406\u4e2d\uff0c\u638c\u63e1<code>TRIM()<\/code>\u51fd\u6578\u7684\u4f7f\u7528\u5c07\u5c0d\u5de5\u4f5c\u6548\u7387\u6709\u5f88\u5927\u5e6b\u52a9\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc<code>VPS<\/code>\u3001<code>\u9999\u6e2fVPS<\/code>\u6216\u5176\u4ed6\u76f8\u95dc\u7684<code>\u670d\u52a1\u5668<\/code>\u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a> \u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u6e05\u9664\u5b57\u7b26\u4e32\u9996\u5c3e\u7a7a\u683c\u7684\u51fd\u6570\uff0c\u63d0\u5347\u6570\u636e\u5904\u7406\u6548\u7387\uff0c\u786e\u4fdd\u6570\u636e\u6574\u6d01\u65e0\u591a\u4f59\u7a7a\u683c\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-76156","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76156","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=76156"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76156\/revisions"}],"predecessor-version":[{"id":76157,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76156\/revisions\/76157"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}