{"id":175237,"date":"2024-11-08T04:11:16","date_gmt":"2024-11-07T20:11:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175237\/"},"modified":"2024-11-08T04:11:17","modified_gmt":"2024-11-07T20:11:17","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8locate%e5%87%bd%e6%95%b8%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a8%a1%e7%b3%8a%e6%9f%a5%e8%a9%a2%ef%bc%9f-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a8%a1%e7%b3%8a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175237\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528LOCATE\u51fd\u6578\u5be6\u73fe\u6578\u64da\u5eab\u6a21\u7cca\u67e5\u8a62\uff1f (\u6578\u64da\u5eab\u6a21\u7cca\u67e5\u8a62locate)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8locate%e5%87%bd%e6%95%b8%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%ba%ab%e6%a8%a1%e7%b3%8a%e6%9f%a5%e8%a9%a2%ef%bc%9f-uzKPPNetTP\">\u5982\u4f55\u4f7f\u7528LOCATE\u51fd\u6578\u5be6\u73fe\u6578\u64da\u5eab\u6a21\u7cca\u67e5\u8a62\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6a21\u7cca\u67e5\u8a62\u662f\u4e00\u7a2e\u5e38\u898b\u7684\u67e5\u8a62\u65b9\u5f0f\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u67e5\u627e\u90e8\u5206\u5339\u914d\u7684\u6578\u64da\u6642\u3002LOCATE\u51fd\u6578\u662fMySQL\u4e2d\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5728\u5b57\u7b26\u4e32\u4e2d\u67e5\u627e\u5b50\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528LOCATE\u51fd\u6578\u4f86\u5be6\u73fe\u6578\u64da\u5eab\u7684\u6a21\u7cca\u67e5\u8a62\u3002<\/p>\n<h2 id=\"locate%e5%87%bd%e6%95%b8%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-uzKPPNetTP\">LOCATE\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>LOCATE\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>\uff1a\u8981\u67e5\u627e\u7684\u5b50\u5b57\u7b26\u4e32\u3002<\/li>\n<li><strong>string<\/strong>\uff1a\u8981\u641c\u7d22\u7684\u5b57\u7b26\u4e32\u3002<\/li>\n<li><strong>start_position<\/strong>\uff08\u53ef\u9078\uff09\uff1a\u5f9e\u5b57\u7b26\u4e32\u7684\u54ea\u500b\u4f4d\u7f6e\u958b\u59cb\u67e5\u627e\uff0c\u9ed8\u8a8d\u70ba1\u3002<\/li>\n<\/ul>\n<p>\u8a72\u51fd\u6578\u8fd4\u56de\u5b50\u5b57\u7b26\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u9996\u6b21\u51fa\u73fe\u7684\u4f4d\u7f6e\uff0c\u5982\u679c\u672a\u627e\u5230\uff0c\u5247\u8fd4\u56de0\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8locate%e5%87%bd%e6%95%b8%e9%80%b2%e8%a1%8c%e6%a8%a1%e7%b3%8a%e6%9f%a5%e8%a9%a2%e7%9a%84%e7%a4%ba%e4%be%8b-uzKPPNetTP\">\u4f7f\u7528LOCATE\u51fd\u6578\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u7684\u793a\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<strong>employees<\/strong>\u7684\u6578\u64da\u8868\uff0c\u8a72\u8868\u5305\u542b\u4ee5\u4e0b\u5b57\u6bb5\uff1a<\/p>\n<ul>\n<li><strong>id<\/strong>\uff1a\u54e1\u5de5ID<\/li>\n<li><strong>name<\/strong>\uff1a\u54e1\u5de5\u59d3\u540d<\/li>\n<li><strong>department<\/strong>\uff1a\u90e8\u9580<\/li>\n<\/ul>\n<p>\u6211\u5011\u5e0c\u671b\u67e5\u627e\u6240\u6709\u59d3\u540d\u4e2d\u5305\u542b\u201cJohn\u201d\u7684\u54e1\u5de5\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE LOCATE('John', name) &gt; 0;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0cLOCATE\u51fd\u6578\u6aa2\u67e5\u6bcf\u500b\u54e1\u5de5\u7684\u59d3\u540d\u4e2d\u662f\u5426\u5305\u542b\u201cJohn\u201d\u3002\u5982\u679c\u5305\u542b\uff0c\u5247\u8fd4\u56de\u8a72\u54e1\u5de5\u7684\u6240\u6709\u4fe1\u606f\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8locate%e5%87%bd%e6%95%b8%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-uzKPPNetTP\">\u4f7f\u7528LOCATE\u51fd\u6578\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528LOCATE\u51fd\u6578\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li><strong>\u5927\u5c0f\u5beb\u654f\u611f\u6027<\/strong>\uff1aLOCATE\u51fd\u6578\u662f\u5927\u5c0f\u5beb\u654f\u611f\u7684\u3002\u5982\u679c\u9700\u8981\u9032\u884c\u4e0d\u5340\u5206\u5927\u5c0f\u5beb\u7684\u67e5\u8a62\uff0c\u53ef\u4ee5\u4f7f\u7528LOWER\u51fd\u6578\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u5c0f\u5beb\u3002<\/li>\n<li><strong>\u6027\u80fd\u554f\u984c<\/strong>\uff1a\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\u4f7f\u7528LOCATE\u51fd\u6578\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002\u5efa\u8b70\u5728\u5fc5\u8981\u6642\u4f7f\u7528\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<li><strong>\u8fd4\u56de\u503c<\/strong>\uff1a\u5982\u679c\u5b50\u5b57\u7b26\u4e32\u5728\u5b57\u7b26\u4e32\u4e2d\u4e0d\u5b58\u5728\uff0cLOCATE\u51fd\u6578\u5c07\u8fd4\u56de0\uff0c\u56e0\u6b64\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u9700\u8981\u8003\u616e\u9019\u4e00\u9ede\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e5%90%88%e5%85%b6%e4%bb%96%e5%87%bd%e6%95%b8%e4%bd%bf%e7%94%a8locate-uzKPPNetTP\">\u7d50\u5408\u5176\u4ed6\u51fd\u6578\u4f7f\u7528LOCATE<\/h2>\n<p>LOCATE\u51fd\u6578\u53ef\u4ee5\u8207\u5176\u4ed6\u5b57\u7b26\u4e32\u51fd\u6578\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u5be6\u73fe\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528CONCAT\u51fd\u6578\u4f86\u67e5\u627e\u591a\u500b\u689d\u4ef6\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE LOCATE('John', CONCAT(name, department)) &gt; 0;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u6aa2\u67e5\u54e1\u5de5\u7684\u59d3\u540d\u548c\u90e8\u9580\u4e2d\u662f\u5426\u5305\u542b\u201cJohn\u201d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-uzKPPNetTP\">\u7e3d\u7d50<\/h2>\n<p>LOCATE\u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u3002\u901a\u904e\u6b63\u78ba\u4f7f\u7528\u8a72\u51fd\u6578\uff0c\u60a8\u53ef\u4ee5\u8f15\u9b06\u67e5\u627e\u5305\u542b\u7279\u5b9a\u5b50\u5b57\u7b26\u4e32\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u5728\u5c0f\u578b\u9084\u662f\u5927\u578b\u6578\u64da\u96c6\u4e0a\uff0c\u638c\u63e1LOCATE\u51fd\u6578\u7684\u4f7f\u7528\u90fd\u80fd\u63d0\u9ad8\u60a8\u7684\u6578\u64da\u67e5\u8a62\u6548\u7387\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u548c\u6578\u64da\u7ba1\u7406\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4f7f\u7528LOCATE\u51fd\u6578\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u6a21\u7cca\u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u904e\u7a0b\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-175237","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175237","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=175237"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175237\/revisions"}],"predecessor-version":[{"id":175238,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175237\/revisions\/175238"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}