{"id":78984,"date":"2024-10-16T12:34:20","date_gmt":"2024-10-16T04:34:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/78984\/"},"modified":"2024-10-16T12:34:20","modified_gmt":"2024-10-16T04:34:20","slug":"mysql%e6%8c%87%e4%bb%a4-locate%ef%bc%88%e6%9f%a5%e6%89%be%e5%ad%90%e4%b8%b2%e4%bd%8d%e7%bd%ae%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/78984\/","title":{"rendered":"MySQL\u6307\u4ee4: LOCATE()\uff08\u67e5\u627e\u5b50\u4e32\u4f4d\u7f6e\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-locate%ef%bc%88%e6%9f%a5%e6%89%be%e5%ad%90%e4%b8%b2%e4%bd%8d%e7%bd%ae%ef%bc%89-ecwtNtryyk\">MySQL\u6307\u4ee4: LOCATE()\uff08\u67e5\u627e\u5b50\u4e32\u4f4d\u7f6e\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u5f37\u5927\u7684\u6307\u4ee4\u4f86\u8655\u7406\u548c\u67e5\u8a62\u8cc7\u6599\u3002\u5176\u4e2d\uff0c<code>LOCATE()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u7528\u65bc\u67e5\u627e\u5b50\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e<code>LOCATE()<\/code>\u51fd\u6578\u7684\u7528\u6cd5\u53ca\u5176\u61c9\u7528\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"locate%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-ecwtNtryyk\">LOCATE()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p><code>LOCATE()<\/code>\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>LOCATE(substring, string, [start_position])<\/code><\/pre>\n<ul>\n<li><strong>substring<\/strong>: \u8981\u67e5\u627e\u7684\u5b50\u4e32\u3002<\/li>\n<li><strong>string<\/strong>: \u88ab\u67e5\u627e\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li><strong>start_position<\/strong>: \u53ef\u9078\u53c3\u6578\uff0c\u6307\u5b9a\u5f9e\u54ea\u500b\u4f4d\u7f6e\u958b\u59cb\u67e5\u627e\uff0c\u9ed8\u8a8d\u70ba1\u3002<\/li>\n<\/ul>\n<p>\u8a72\u51fd\u6578\u8fd4\u56de\u5b50\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73fe\u7684\u4f4d\u7f6e\uff0c\u5982\u679c\u672a\u627e\u5230\u5247\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-ecwtNtryyk\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528<code>LOCATE()<\/code>\u51fd\u6578\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1-%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-ecwtNtryyk\">\u7bc4\u4f8b1: \u57fa\u672c\u7528\u6cd5<\/h3>\n<pre><code>SELECT LOCATE('apple', 'I have an apple.');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u627e\u5b57\u4e32\u300capple\u300d\u5728\u300cI have an apple.\u300d\u4e2d\u7684\u4f4d\u7f6e\u3002\u7d50\u679c\u5c07\u8fd4\u56de8\uff0c\u56e0\u70ba\u300capple\u300d\u5f9e\u7b2c8\u500b\u5b57\u7b26\u958b\u59cb\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2-%e6%8c%87%e5%ae%9a%e8%b5%b7%e5%a7%8b%e4%bd%8d%e7%bd%ae-ecwtNtryyk\">\u7bc4\u4f8b2: \u6307\u5b9a\u8d77\u59cb\u4f4d\u7f6e<\/h3>\n<pre><code>SELECT LOCATE('a', 'banana', 3);<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u67e5\u627e\u5b57\u6bcd\u300ca\u300d\u5728\u300cbanana\u300d\u4e2d\u7684\u4f4d\u7f6e\uff0c\u4f46\u5f9e\u7b2c3\u500b\u5b57\u7b26\u958b\u59cb\u67e5\u627e\u3002\u7d50\u679c\u5c07\u8fd4\u56de4\uff0c\u56e0\u70ba\u5f9e\u7b2c3\u500b\u5b57\u7b26\u958b\u59cb\uff0c\u7b2c\u4e00\u500b\u300ca\u300d\u51fa\u73fe\u5728\u7b2c4\u500b\u4f4d\u7f6e\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b3-%e6%9c%aa%e6%89%be%e5%88%b0%e7%9a%84%e6%83%85%e6%b3%81-ecwtNtryyk\">\u7bc4\u4f8b3: \u672a\u627e\u5230\u7684\u60c5\u6cc1<\/h3>\n<pre><code>SELECT LOCATE('orange', 'I have an apple.');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u627e\u5b57\u4e32\u300corange\u300d\u5728\u300cI have an apple.\u300d\u4e2d\u7684\u4f4d\u7f6e\u3002\u7531\u65bc\u300corange\u300d\u4e26\u4e0d\u5b58\u5728\u65bc\u8a72\u5b57\u7b26\u4e32\u4e2d\uff0c\u7d50\u679c\u5c07\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-ecwtNtryyk\">\u61c9\u7528\u5834\u666f<\/h2>\n<p><code>LOCATE()<\/code>\u51fd\u6578\u5728\u591a\u7a2e\u60c5\u6cc1\u4e0b\u90fd\u975e\u5e38\u6709\u7528\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u5206\u6790\u548c\u8655\u7406\u6587\u672c\u6578\u64da\u6642\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u61c9\u7528\u5834\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u6e05\u7406<\/strong>: \u5728\u6578\u64da\u6e05\u7406\u904e\u7a0b\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528<code>LOCATE()<\/code>\u4f86\u6aa2\u67e5\u7279\u5b9a\u5b57\u7b26\u6216\u5b50\u4e32\u662f\u5426\u5b58\u5728\u65bc\u6578\u64da\u4e2d\u3002<\/li>\n<li><strong>\u6587\u672c\u5206\u6790<\/strong>: \u5728\u9032\u884c\u6587\u672c\u5206\u6790\u6642\uff0c\u53ef\u4ee5\u5229\u7528\u6b64\u51fd\u6578\u4f86\u63d0\u53d6\u7279\u5b9a\u4fe1\u606f\u6216\u9032\u884c\u6a21\u5f0f\u5339\u914d\u3002<\/li>\n<li><strong>\u5831\u544a\u751f\u6210<\/strong>: \u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528<code>LOCATE()<\/code>\u4f86\u5b9a\u4f4d\u7279\u5b9a\u6578\u64da\uff0c\u5f9e\u800c\u9032\u884c\u66f4\u6df1\u5165\u7684\u5206\u6790\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ecwtNtryyk\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u4f7f\u7528<code>LOCATE()<\/code>\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u51fd\u6578\u662f\u5340\u5206\u5927\u5c0f\u5beb\u7684\uff0c\u56e0\u6b64\u300capple\u300d\u548c\u300cApple\u300d\u6703\u88ab\u8996\u70ba\u4e0d\u540c\u7684\u5b50\u4e32\u3002<\/li>\n<li>\u5982\u679c\u6307\u5b9a\u7684\u8d77\u59cb\u4f4d\u7f6e\u8d85\u904e\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\uff0c\u5247\u51fd\u6578\u5c07\u8fd4\u56de0\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ecwtNtryyk\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684<code>LOCATE()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u5b50\u4e32\u7684\u4f4d\u7f6e\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u6e05\u7406\u3001\u6587\u672c\u5206\u6790\u9084\u662f\u5831\u544a\u751f\u6210\u4e2d\uff0c\u9019\u500b\u51fd\u6578\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u4e86\u89e3\u5982\u4f55\u6709\u6548\u4f7f\u7528<code>LOCATE()<\/code>\u51fd\u6578\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc<code>LOCATE()<\/code>\u51fd\u6578\u6216\u5176\u4ed6MySQL\u6307\u4ee4\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u5efa\u8b70\u60a8\u63a2\u7d22\u66f4\u591a\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\u8cc7\u6e90\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u7ba1\u7406\u548c\u512a\u5316\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL LOCATE()\u51fd\u6570\uff0c\u5feb\u901f\u67e5\u627e\u5b50\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u7684\u4f4d\u7f6e\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-78984","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78984","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=78984"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78984\/revisions"}],"predecessor-version":[{"id":78985,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78984\/revisions\/78985"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=78984"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=78984"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=78984"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}