{"id":60861,"date":"2024-10-13T06:26:14","date_gmt":"2024-10-12T22:26:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/60861\/"},"modified":"2024-10-13T06:26:14","modified_gmt":"2024-10-12T22:26:14","slug":"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adlike%e4%bd%bf%e7%94%a8%e7%9a%84%e4%b8%80%e4%ba%9b%e5%bf%83%e5%be%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/60861\/","title":{"rendered":"DB2\u6578\u64da\u5eab\u4e2dlike\u4f7f\u7528\u7684\u4e00\u4e9b\u5fc3\u5f97"},"content":{"rendered":"<h1 id=\"db2%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%adlike%e4%bd%bf%e7%94%a8%e7%9a%84%e4%b8%80%e4%ba%9b%e5%bf%83%e5%be%97-mHyIRHiahc\">DB2\u6578\u64da\u5eab\u4e2dLIKE\u4f7f\u7528\u7684\u4e00\u4e9b\u5fc3\u5f97<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u67e5\u8a62\u6578\u64da\u7684\u65b9\u5f0f\u591a\u7a2e\u591a\u6a23\uff0c\u5176\u4e2d\u4f7f\u7528LIKE\u904b\u7b97\u7b26\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002DB2\u4f5c\u70baIBM\u7684\u4e00\u6b3e\u5f37\u5927\u6578\u64da\u5eab\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684LIKE\u904b\u7b97\u7b26\u4f7f\u7528\u65b9\u5f0f\u3002\u672c\u6587\u5c07\u63a2\u8a0eDB2\u6578\u64da\u5eab\u4e2dLIKE\u7684\u4f7f\u7528\u5fc3\u5f97\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u9032\u884c\u6578\u64da\u67e5\u8a62\u3002<\/p>\n<h2 id=\"like%e9%81%8b%e7%ae%97%e7%ac%a6%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%94%a8%e6%b3%95-mHyIRHiahc\">LIKE\u904b\u7b97\u7b26\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n<p>\u5728DB2\u4e2d\uff0cLIKE\u904b\u7b97\u7b26\u4e3b\u8981\u7528\u65bc\u5728\u67e5\u8a62\u4e2d\u9032\u884c\u6a21\u5f0f\u5339\u914d\u3002\u5176\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>\u5176\u4e2d\uff0cpattern\u53ef\u4ee5\u5305\u542b\u901a\u914d\u7b26\uff0c\u4e3b\u8981\u6709\u5169\u7a2e\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<p>\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u67e5\u8a62\u6240\u6709\u4ee5\u201cabc\u201d\u958b\u982d\u7684\u540d\u7a31\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE name LIKE 'abc%';<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8like%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-mHyIRHiahc\">\u4f7f\u7528LIKE\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528LIKE\u904b\u7b97\u7b26\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<h3 id=\"1-%e6%80%a7%e8%83%bd%e5%95%8f%e9%a1%8c-mHyIRHiahc\">1. \u6027\u80fd\u554f\u984c<\/h3>\n<p>\u4f7f\u7528LIKE\u9032\u884c\u6a21\u7cca\u67e5\u8a62\u6642\uff0c\u7279\u5225\u662f\u4ee5\u901a\u914d\u7b26\u958b\u982d\u7684\u67e5\u8a62\uff08\u5982&#8217;%abc&#8217;\uff09\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u5168\u8868\u6383\u63cf\uff0c\u5f9e\u800c\u5f71\u97ff\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u5efa\u8b70\u5728\u6578\u64da\u91cf\u8f03\u5927\u7684\u8868\u4e2d\u8b39\u614e\u4f7f\u7528\u3002<\/p>\n<h3 id=\"2-%e5%a4%a7%e5%b0%8f%e5%af%ab%e6%95%8f%e6%84%9f%e6%80%a7-mHyIRHiahc\">2. \u5927\u5c0f\u5beb\u654f\u611f\u6027<\/h3>\n<p>DB2\u7684LIKE\u904b\u7b97\u7b26\u5728\u9ed8\u8a8d\u60c5\u6cc1\u4e0b\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\u7528UPPER\u6216LOWER\u51fd\u6578\u4f86\u8f49\u63db\u5b57\u7b26\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE UPPER(name) LIKE UPPER('abc%');<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e6%ad%a3%e5%89%87%e8%a1%a8%e9%81%94%e5%bc%8f-mHyIRHiahc\">3. \u4f7f\u7528\u6b63\u5247\u8868\u9054\u5f0f<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528LIKE\u53ef\u80fd\u7121\u6cd5\u6eff\u8db3\u8907\u96dc\u7684\u67e5\u8a62\u9700\u6c42\u3002DB2\u652f\u6301\u6b63\u5247\u8868\u9054\u5f0f\uff0c\u53ef\u4ee5\u4f7f\u7528REGEXP\u904b\u7b97\u7b26\u4f86\u9032\u884c\u66f4\u9748\u6d3b\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE name REGEXP '^abc.*';<\/code><\/pre>\n<h2 id=\"%e5%af%a6%e9%9a%9b%e6%87%89%e7%94%a8%e6%a1%88%e4%be%8b-mHyIRHiahc\">\u5be6\u969b\u61c9\u7528\u6848\u4f8b<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u7528\u6236\u8868\uff0c\u5305\u542b\u7528\u6236\u7684\u59d3\u540d\u3001\u96fb\u5b50\u90f5\u4ef6\u548c\u8a3b\u518a\u65e5\u671f\u3002\u6211\u5011\u5e0c\u671b\u67e5\u8a62\u6240\u6709\u96fb\u5b50\u90f5\u4ef6\u4ee5\u201c@example.com\u201d\u7d50\u5c3e\u7684\u7528\u6236\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT * FROM users WHERE email LIKE '%@example.com';<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u80fd\u5920\u5feb\u901f\u627e\u5230\u6240\u6709\u7b26\u5408\u689d\u4ef6\u7684\u7528\u6236\uff0c\u4e26\u4e14\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u975e\u5e38\u5e38\u898b\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-mHyIRHiahc\">\u7d50\u8ad6<\/h2>\n<p>\u5728DB2\u6578\u64da\u5eab\u4e2d\uff0cLIKE\u904b\u7b97\u7b26\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u9032\u884c\u9748\u6d3b\u7684\u6578\u64da\u67e5\u8a62\u3002\u7136\u800c\uff0c\u5728\u4f7f\u7528\u6642\u9700\u8981\u6ce8\u610f\u6027\u80fd\u554f\u984c\u3001\u5927\u5c0f\u5beb\u654f\u611f\u6027\u4ee5\u53ca\u67e5\u8a62\u7684\u8907\u96dc\u6027\u3002\u901a\u904e\u5408\u7406\u7684\u4f7f\u7528LIKE\u904b\u7b97\u7b26\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u6eff\u8db3\u696d\u52d9\u9700\u6c42\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\u90e8\u7f72\u60a8\u7684DB2\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22DB2\u6578\u64da\u5eab\u4e2d\u4f7f\u7528LIKE\u7684\u6280\u5de7\u8207\u5fc3\u5f97\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u6aa2\u7d22\u9ad4\u9a57\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-60861","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60861","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"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=60861"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60861\/revisions"}],"predecessor-version":[{"id":60862,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/60861\/revisions\/60862"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=60861"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=60861"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=60861"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}