{"id":185296,"date":"2024-11-10T20:22:56","date_gmt":"2024-11-10T12:22:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/185296\/"},"modified":"2024-11-10T20:22:57","modified_gmt":"2024-11-10T12:22:57","slug":"%e4%bd%bf%e7%94%a8sql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adlike%e8%aa%9e%e5%8f%a5%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e6%9f%a5%e8%a9%a2%ef%bc%88sql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adlike%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/185296\/","title":{"rendered":"\u4f7f\u7528SQL\u6578\u64da\u5eab\u4e2dLIKE\u8a9e\u53e5\u5be6\u73fe\u9ad8\u6548\u67e5\u8a62\uff08sql\u6578\u64da\u5eab\u4e2dlike\uff09"},"content":{"rendered":"<h1 id=\"%e4%bd%bf%e7%94%a8sql%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adlike%e8%aa%9e%e5%8f%a5%e5%af%a6%e7%8f%be%e9%ab%98%e6%95%88%e6%9f%a5%e8%a9%a2-aiELjRJFIJ\">\u4f7f\u7528SQL\u6578\u64da\u5eab\u4e2dLIKE\u8a9e\u53e5\u5be6\u73fe\u9ad8\u6548\u67e5\u8a62<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u67e5\u8a62\u6548\u7387\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u81f3\u95dc\u91cd\u8981\u3002SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\uff0c\u5176\u4e2dLIKE\u8a9e\u53e5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9032\u884c\u6a21\u5f0f\u5339\u914d\u67e5\u8a62\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728SQL\u6578\u64da\u5eab\u4e2d\u4f7f\u7528LIKE\u8a9e\u53e5\u4f86\u5be6\u73fe\u9ad8\u6548\u67e5\u8a62\u3002<\/p>\n<h2 id=\"like%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-aiELjRJFIJ\">LIKE\u8a9e\u53e5\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n<p>LIKE\u8a9e\u53e5\u4e3b\u8981\u7528\u65bc\u5728SQL\u67e5\u8a62\u4e2d\u9032\u884c\u6a21\u7cca\u5339\u914d\u3002\u5b83\u901a\u5e38\u8207SELECT\u8a9e\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u67e5\u627e\u7b26\u5408\u7279\u5b9a\u6a21\u5f0f\u7684\u6578\u64da\u3002LIKE\u8a9e\u53e5\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>\u53ef\u4ee5\u5305\u542b\u901a\u914d\u7b26\uff0c\u6700\u5e38\u7528\u7684\u6709\uff1a<\/p>\n<ul>\n<li><code>%<\/code>\uff1a\u8868\u793a\u96f6\u500b\u6216\u591a\u500b\u5b57\u7b26\u3002<\/li>\n<li><code>_<\/code>\uff1a\u8868\u793a\u55ae\u500b\u5b57\u7b26\u3002<\/li>\n<\/ul>\n<h2 id=\"like%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8-aiELjRJFIJ\">LIKE\u8a9e\u53e5\u7684\u5be6\u969b\u61c9\u7528<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>customers<\/code>\u7684\u8868\uff0c\u5305\u542b\u5ba2\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002\u5982\u679c\u6211\u5011\u60f3\u67e5\u627e\u6240\u6709\u4ee5\u201cJohn\u201d\u958b\u982d\u7684\u5ba2\u6236\u59d3\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM customers\nWHERE name LIKE 'John%';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u59d3\u540d\u4ee5\u201cJohn\u201d\u958b\u982d\u7684\u5ba2\u6236\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u5982\u679c\u6211\u5011\u60f3\u67e5\u627e\u6240\u6709\u5305\u542b\u201cgmail\u201d\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\uff0c\u53ef\u4ee5\u4f7f\u7528\uff1a<\/p>\n<pre><code>SELECT * FROM customers\nWHERE email LIKE '%gmail%';<\/code><\/pre>\n<h2 id=\"%e6%8f%90%e9%ab%98like%e6%9f%a5%e8%a9%a2%e6%95%88%e7%8e%87%e7%9a%84%e6%8a%80%e5%b7%a7-aiELjRJFIJ\">\u63d0\u9ad8LIKE\u67e5\u8a62\u6548\u7387\u7684\u6280\u5de7<\/h2>\n<p>\u5118\u7ba1LIKE\u8a9e\u53e5\u975e\u5e38\u9748\u6d3b\uff0c\u4f46\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u63d0\u9ad8LIKE\u67e5\u8a62\u6548\u7387\u7684\u6280\u5de7\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-aiELjRJFIJ\">1. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u5728\u67e5\u8a62\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u5c0d\u65bc\u7d93\u5e38\u4f7f\u7528LIKE\u8a9e\u53e5\u7684\u5217\uff0c\u5efa\u8b70\u5275\u5efaB-tree\u7d22\u5f15\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7d22\u5f15\u5c0d\u65bc\u4ee5\u901a\u914d\u7b26\u958b\u982d\u7684\u6a21\u5f0f\uff08\u4f8b\u5982<code>%pattern<\/code>\uff09\u7121\u6cd5\u63d0\u4f9b\u6027\u80fd\u63d0\u5347\u3002<\/p>\n<h3 id=\"2-%e9%99%90%e5%88%b6%e7%b5%90%e6%9e%9c%e9%9b%86-aiELjRJFIJ\">2. \u9650\u5236\u7d50\u679c\u96c6<\/h3>\n<p>\u5728\u4f7f\u7528LIKE\u8a9e\u53e5\u6642\uff0c\u76e1\u91cf\u9650\u5236\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528<code>LIMIT<\/code>\u5b50\u53e5\u4f86\u9650\u5236\u8fd4\u56de\u7684\u884c\u6578\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u7684\u8655\u7406\u91cf\u3002<\/p>\n<pre><code>SELECT * FROM customers\nWHERE name LIKE 'John%'\nLIMIT 10;<\/code><\/pre>\n<h3 id=\"3-%e9%81%bf%e5%85%8d%e4%bd%bf%e7%94%a8%e9%80%9a%e9%85%8d%e7%ac%a6%e9%96%8b%e9%a0%ad-aiELjRJFIJ\">3. \u907f\u514d\u4f7f\u7528\u901a\u914d\u7b26\u958b\u982d<\/h3>\n<p>\u5982\u524d\u6240\u8ff0\uff0c\u4f7f\u7528\u901a\u914d\u7b26<code>%<\/code>\u4f5c\u70ba\u6a21\u5f0f\u7684\u958b\u982d\u6703\u5c0e\u81f4\u5168\u8868\u6383\u63cf\uff0c\u9019\u6703\u986f\u8457\u964d\u4f4e\u67e5\u8a62\u6027\u80fd\u3002\u76e1\u91cf\u907f\u514d\u9019\u7a2e\u60c5\u6cc1\uff0c\u4e26\u8003\u616e\u5176\u4ed6\u67e5\u8a62\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-aiELjRJFIJ\">\u7d50\u8ad6<\/h2>\n<p>LIKE\u8a9e\u53e5\u5728SQL\u6578\u64da\u5eab\u4e2d\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9032\u884c\u9748\u6d3b\u7684\u67e5\u8a62\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528LIKE\u8a9e\u53e5\u53ca\u5176\u901a\u914d\u7b26\uff0c\u4e26\u7d50\u5408\u7d22\u5f15\u548c\u5176\u4ed6\u512a\u5316\u6280\u5de7\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u5927\u91cf\u6578\u64da\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u9019\u4e9b\u6280\u5de7\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<p>\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\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5feb\u901f\u5b58\u53d6\u548c<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u5982\u4f55\u5728SQL\u6578\u64da\u5eab\u4e2d\u4f7f\u7528LIKE\u8a9e\u53e5\u9032\u884c\u9ad8\u6548\u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u901f\u5ea6\u8207\u6e96\u78ba\u6027\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-185296","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185296","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=185296"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185296\/revisions"}],"predecessor-version":[{"id":185297,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/185296\/revisions\/185297"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=185296"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=185296"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=185296"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}