{"id":78976,"date":"2024-10-16T12:30:17","date_gmt":"2024-10-16T04:30:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/78976\/"},"modified":"2024-10-16T12:30:17","modified_gmt":"2024-10-16T04:30:17","slug":"mysql%e6%8c%87%e4%bb%a4-like%ef%bc%88%e6%a8%a1%e7%b3%8a%e5%8c%b9%e9%85%8d%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/78976\/","title":{"rendered":"MySQL\u6307\u4ee4: LIKE\uff08\u6a21\u7cca\u5339\u914d\uff09"},"content":{"rendered":"<h1 id=\"mysql%e6%8c%87%e4%bb%a4-like%ef%bc%88%e6%a8%a1%e7%b3%8a%e5%8c%b9%e9%85%8d%ef%bc%89-ayaHMychqu\">MySQL\u6307\u4ee4: LIKE\uff08\u6a21\u7cca\u5339\u914d\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\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\u67e5\u8a62\u529f\u80fd\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u6a21\u7cca\u5339\u914d\u6307\u4ee4LIKE\u3002\u9019\u500b\u6307\u4ee4\u5141\u8a31\u7528\u6236\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u901a\u914d\u7b26\uff0c\u5f9e\u800c\u9032\u884c\u66f4\u9748\u6d3b\u7684\u8cc7\u6599\u6aa2\u7d22\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u4e2d\u7684LIKE\u6307\u4ee4\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u61c9\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"like%e6%8c%87%e4%bb%a4%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-ayaHMychqu\">LIKE\u6307\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>LIKE\u6307\u4ee4\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table_name\nWHERE column_name LIKE pattern;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>pattern<\/code>\u662f\u7528\u4f86\u5339\u914d\u7684\u6a21\u5f0f\uff0c\u53ef\u4ee5\u5305\u542b\u901a\u914d\u7b26\u3002MySQL\u4e2d\u4e3b\u8981\u6709\u5169\u7a2e\u901a\u914d\u7b26\uff1a<\/p>\n<ul>\n<li><strong>%<\/strong>\uff1a\u4ee3\u8868\u96f6\u500b\u6216\u591a\u500b\u5b57\u7b26\u3002<\/li>\n<li><strong>_<\/strong>\uff1a\u4ee3\u8868\u55ae\u500b\u5b57\u7b26\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8like%e6%8c%87%e4%bb%a4%e7%9a%84%e7%af%84%e4%be%8b-ayaHMychqu\">\u4f7f\u7528LIKE\u6307\u4ee4\u7684\u7bc4\u4f8b<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4f7f\u7528LIKE\u6307\u4ee4\u7684\u7bc4\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b1%ef%bc%9a%e4%bd%bf%e7%94%a8%e7%99%be%e5%88%86%e8%99%9f%e9%80%9a%e9%85%8d%e7%ac%a6-ayaHMychqu\">\u7bc4\u4f8b1\uff1a\u4f7f\u7528\u767e\u5206\u865f\u901a\u914d\u7b26<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>customers<\/code>\u7684\u8868\u683c\uff0c\u88e1\u9762\u6709\u4e00\u500b<code>name<\/code>\u6b04\u4f4d\u3002\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u540d\u5b57\u4ee5\u201cJ\u201d\u958b\u982d\u7684\u5ba2\u6236\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM customers\nWHERE name LIKE 'J%';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u540d\u5b57\u4ee5\u201cJ\u201d\u958b\u982d\u7684\u5ba2\u6236\uff0c\u4f8b\u5982\u201cJohn\u201d\u3001\u201cJane\u201d\u7b49\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b2%ef%bc%9a%e4%bd%bf%e7%94%a8%e4%b8%8b%e5%8a%83%e7%b7%9a%e9%80%9a%e9%85%8d%e7%ac%a6-ayaHMychqu\">\u7bc4\u4f8b2\uff1a\u4f7f\u7528\u4e0b\u5283\u7dda\u901a\u914d\u7b26<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u67e5\u8a62\u540d\u5b57\u4e2d\u7b2c\u4e8c\u500b\u5b57\u6bcd\u662f\u201ca\u201d\u7684\u6240\u6709\u5ba2\u6236\uff0c\u53ef\u4ee5\u4f7f\u7528\u4e0b\u5283\u7dda\u901a\u914d\u7b26\uff1a<\/p>\n<pre><code>SELECT * FROM customers\nWHERE name LIKE '_a%';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u540d\u5b57\u4e2d\u7b2c\u4e8c\u500b\u5b57\u6bcd\u662f\u201ca\u201d\u7684\u5ba2\u6236\uff0c\u4f8b\u5982\u201cMark\u201d\u3001\u201cSara\u201d\u7b49\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b3%ef%bc%9a%e7%b5%90%e5%90%88%e5%a4%9a%e5%80%8b%e6%a2%9d%e4%bb%b6-ayaHMychqu\">\u7bc4\u4f8b3\uff1a\u7d50\u5408\u591a\u500b\u689d\u4ef6<\/h3>\n<p>\u6211\u5011\u4e5f\u53ef\u4ee5\u7d50\u5408\u591a\u500bLIKE\u689d\u4ef6\u4f86\u9032\u884c\u66f4\u8907\u96dc\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u540d\u5b57\u4ee5\u201cJ\u201d\u958b\u982d\u4e14\u5305\u542b\u201cn\u201d\u7684\u5ba2\u6236\uff1a<\/p>\n<pre><code>SELECT * FROM customers\nWHERE name LIKE 'J%' AND name LIKE '%n%';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u540d\u5b57\u4ee5\u201cJ\u201d\u958b\u982d\u4e14\u5305\u542b\u5b57\u6bcd\u201cn\u201d\u7684\u5ba2\u6236\uff0c\u4f8b\u5982\u201cJohn\u201d\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ayaHMychqu\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528LIKE\u6307\u4ee4\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>LIKE\u6307\u4ee4\u7684\u67e5\u8a62\u901a\u5e38\u6bd4\u7b49\u865f\uff08=\uff09\u67e5\u8a62\u6162\uff0c\u56e0\u70ba\u5b83\u9700\u8981\u9032\u884c\u6a21\u5f0f\u5339\u914d\u3002<\/li>\n<li>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528LIKE\u6307\u4ee4\u53ef\u80fd\u6703\u5c0e\u81f4\u5168\u8868\u6383\u63cf\uff0c\u5f71\u97ff\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u5c0d\u65bc\u5927\u578b\u8cc7\u6599\u8868\uff0c\u61c9\u8b39\u614e\u4f7f\u7528\u3002<\/li>\n<li>LIKE\u6307\u4ee4\u5c0d\u65bc\u5927\u5c0f\u5beb\u7684\u654f\u611f\u6027\u53d6\u6c7a\u65bc\u8cc7\u6599\u5eab\u7684\u5b57\u7b26\u96c6\u548c\u6392\u5e8f\u898f\u5247\u3002\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528<code>LOWER()<\/code>\u6216<code>UPPER()<\/code>\u51fd\u6578\u4f86\u9032\u884c\u4e0d\u5340\u5206\u5927\u5c0f\u5beb\u7684\u5339\u914d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ayaHMychqu\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u4e2d\u7684LIKE\u6307\u4ee4\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9032\u884c\u9748\u6d3b\u7684\u8cc7\u6599\u6aa2\u7d22\u3002\u901a\u904e\u4f7f\u7528\u901a\u914d\u7b26\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u8f15\u9b06\u5730\u67e5\u8a62\u7b26\u5408\u7279\u5b9a\u6a21\u5f0f\u7684\u8cc7\u6599\u3002\u5118\u7ba1LIKE\u6307\u4ee4\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u4f46\u5728\u9700\u8981\u6a21\u7cca\u5339\u914d\u7684\u5834\u666f\u4e2d\uff0c\u5b83\u4ecd\u7136\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u529f\u80fd\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u8cc7\u6599\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684MySQL\u74b0\u5883\uff0c\u4eab\u53d7\u66f4\u5feb\u7684\u67e5\u8a62\u901f\u5ea6\u548c\u66f4\u7a69\u5b9a\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u4e2d\u7684LIKE\u6307\u4ee4\uff0c\u638c\u63e1\u6a21\u7cca\u5339\u914d\u6280\u5de7\uff0c\u8f7b\u677e\u67e5\u8be2\u6570\u636e\u5e93\u4e2d\u7684\u76f8\u5173\u6570\u636e\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-78976","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78976","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=78976"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78976\/revisions"}],"predecessor-version":[{"id":78977,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/78976\/revisions\/78977"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=78976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=78976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=78976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}