{"id":78766,"date":"2024-10-16T12:15:22","date_gmt":"2024-10-16T04:15:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/78766\/"},"modified":"2024-10-16T12:15:22","modified_gmt":"2024-10-16T04:15:22","slug":"mysql%e6%8c%87%e4%bb%a4-instr%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\/78766\/","title":{"rendered":"MySQL\u6307\u4ee4: INSTR()\uff08\u67e5\u627e\u5b50\u4e32\u4f4d\u7f6e\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-instr%ef%bc%88%e6%9f%a5%e6%89%be%e5%ad%90%e4%b8%b2%e4%bd%8d%e7%bd%ae%ef%bc%89-gUKEKQpJtm\">MySQL\u6307\u4ee4: INSTR()\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>INSTR()<\/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>INSTR()<\/code>\u51fd\u6578\u7684\u7528\u6cd5\u53ca\u5176\u61c9\u7528\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"instr%e5%87%bd%e6%95%b8%e6%a6%82%e8%bf%b0-gUKEKQpJtm\">INSTR()\u51fd\u6578\u6982\u8ff0<\/h2>\n<p><code>INSTR()<\/code>\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>INSTR(string, substring)<\/code><\/pre>\n<p>\u9019\u500b\u51fd\u6578\u63a5\u53d7\u5169\u500b\u53c3\u6578\uff1a<\/p>\n<ul>\n<li><code>string<\/code>: \u8981\u641c\u7d22\u7684\u4e3b\u5b57\u7b26\u4e32\u3002<\/li>\n<li><code>substring<\/code>: \u8981\u67e5\u627e\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n<p>\u51fd\u6578\u8fd4\u56de\u5b50\u5b57\u7b26\u4e32\u5728\u4e3b\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73fe\u7684\u4f4d\u7f6e\u3002\u5982\u679c\u5b50\u5b57\u7b26\u4e32\u4e0d\u5b58\u5728\u65bc\u4e3b\u5b57\u7b26\u4e32\u4e2d\uff0c\u5247\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-gUKEKQpJtm\">\u4f7f\u7528\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528<code>INSTR()<\/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-gUKEKQpJtm\">\u7bc4\u4f8b1: \u57fa\u672c\u7528\u6cd5<\/h3>\n<pre><code>SELECT INSTR('Hello World', 'World');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u627e\u5b57\u7b26\u4e32\u300cWorld\u300d\u5728\u300cHello World\u300d\u4e2d\u7684\u4f4d\u7f6e\u3002\u7d50\u679c\u5c07\u8fd4\u56de7\uff0c\u56e0\u70ba\u300cWorld\u300d\u5f9e\u7b2c7\u500b\u5b57\u7b26\u958b\u59cb\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2-%e5%ad%90%e5%ad%97%e7%ac%a6%e4%b8%b2%e4%b8%8d%e5%ad%98%e5%9c%a8%e7%9a%84%e6%83%85%e6%b3%81-gUKEKQpJtm\">\u7bc4\u4f8b2: \u5b50\u5b57\u7b26\u4e32\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1<\/h3>\n<pre><code>SELECT INSTR('Hello World', 'PHP');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u67e5\u627e\u5b57\u7b26\u4e32\u300cPHP\u300d\u5728\u300cHello World\u300d\u4e2d\u7684\u4f4d\u7f6e\u3002\u7531\u65bc\u300cPHP\u300d\u4e26\u4e0d\u5b58\u5728\u65bc\u4e3b\u5b57\u7b26\u4e32\u4e2d\uff0c\u7d50\u679c\u5c07\u8fd4\u56de0\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b3-%e5%a4%a7%e5%b0%8f%e5%af%ab%e6%95%8f%e6%84%9f%e6%80%a7-gUKEKQpJtm\">\u7bc4\u4f8b3: \u5927\u5c0f\u5beb\u654f\u611f\u6027<\/h3>\n<pre><code>SELECT INSTR('Hello World', 'hello');<\/code><\/pre>\n<p>\u9019\u500b\u4f8b\u5b50\u5c55\u793a\u4e86\u5927\u5c0f\u5beb\u654f\u611f\u6027\u3002\u7531\u65bc\u300chello\u300d\u8207\u300cHello\u300d\u7684\u5927\u5c0f\u5beb\u4e0d\u540c\uff0c\u7d50\u679c\u5c07\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-gUKEKQpJtm\">\u61c9\u7528\u5834\u666f<\/h2>\n<p><code>INSTR()<\/code>\u51fd\u6578\u5728\u591a\u7a2e\u60c5\u6cc1\u4e0b\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u6e05\u7406\uff1a\u5728\u8655\u7406\u7528\u6236\u8f38\u5165\u7684\u6578\u64da\u6642\uff0c\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u7279\u5b9a\u5b57\u7b26\u6216\u5b57\u7b26\u4e32\u662f\u5426\u5b58\u5728\u3002<\/li>\n<li>\u5831\u544a\u751f\u6210\uff1a\u5728\u751f\u6210\u5831\u544a\u6642\uff0c\u53ef\u4ee5\u7528\u4f86\u67e5\u627e\u7279\u5b9a\u4fe1\u606f\u7684\u4f4d\u7f6e\uff0c\u5f9e\u800c\u9032\u884c\u66f4\u6df1\u5165\u7684\u5206\u6790\u3002<\/li>\n<li>\u6578\u64da\u9a57\u8b49\uff1a\u5728\u6578\u64da\u9a57\u8b49\u904e\u7a0b\u4e2d\uff0c\u53ef\u4ee5\u7528\u4f86\u78ba\u4fdd\u67d0\u4e9b\u95dc\u9375\u5b57\u6216\u683c\u5f0f\u7684\u5b58\u5728\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-gUKEKQpJtm\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u4f7f\u7528<code>INSTR()<\/code>\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u51fd\u6578\u662f\u5927\u5c0f\u5beb\u654f\u611f\u7684\uff0c\u9019\u610f\u5473\u8457\u300cabc\u300d\u548c\u300cABC\u300d\u6703\u88ab\u8996\u70ba\u4e0d\u540c\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u8fd4\u56de\u7684\u7d22\u5f15\u662f\u57fa\u65bc1\u7684\uff0c\u9019\u8207\u67d0\u4e9b\u7de8\u7a0b\u8a9e\u8a00\uff08\u5982Python\uff09\u4e2d\u7684\u57fa\u65bc0\u7684\u7d22\u5f15\u4e0d\u540c\u3002<\/li>\n<li>\u5982\u679c\u9700\u8981\u9032\u884c\u4e0d\u5340\u5206\u5927\u5c0f\u5beb\u7684\u67e5\u627e\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528<code>LOCATE()<\/code>\u51fd\u6578\uff0c\u8a72\u51fd\u6578\u63d0\u4f9b\u4e86\u76f8\u4f3c\u7684\u529f\u80fd\uff0c\u4f46\u652f\u6301\u4e0d\u5340\u5206\u5927\u5c0f\u5beb\u7684\u67e5\u627e\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gUKEKQpJtm\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7684<code>INSTR()<\/code>\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u5b50\u4e32\u7684\u4f4d\u7f6e\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u6e05\u7406\u3001\u5831\u544a\u751f\u6210\u9084\u662f\u6578\u64da\u9a57\u8b49\u4e2d\uff0c<code>INSTR()<\/code>\u90fd\u80fd\u767c\u63ee\u91cd\u8981\u4f5c\u7528\u3002\u4e86\u89e3\u5982\u4f55\u6709\u6548\u4f7f\u7528\u9019\u500b\u51fd\u6578\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u8cc7\u6599\u5eab\u64cd\u4f5c\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc<code>INSTR()<\/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\u4e26\u63a2\u7d22\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">VPS<\/a> \u53ca\u5176\u4ed6\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL INSTR()\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-78766","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78766","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=78766"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78766\/revisions"}],"predecessor-version":[{"id":78767,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78766\/revisions\/78767"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=78766"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=78766"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=78766"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}