{"id":175453,"date":"2024-11-08T06:00:18","date_gmt":"2024-11-07T22:00:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175453\/"},"modified":"2024-11-08T06:00:19","modified_gmt":"2024-11-07T22:00:19","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5%e5%b0%8d%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%b2%e8%a1%8c%e6%96%87%e6%9c%ac%e7%af%a9%e9%81%b8%ef%bc%88%e6%96%87%e6%9c%ac%e6%80%8e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175453\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u67e5\u8a62\u8a9e\u53e5\u5c0d\u6578\u64da\u5eab\u9032\u884c\u6587\u672c\u7be9\u9078\uff08\u6587\u672c\u600e\u9ebc\u7be9\u9078\u6578\u64da\u5eab\uff09"},"content":{"rendered":"

\u5982\u4f55\u4f7f\u7528\u67e5\u8a62\u8a9e\u53e5\u5c0d\u6578\u64da\u5eab\u9032\u884c\u6587\u672c\u7be9\u9078\uff08\u6587\u672c\u600e\u9ebc\u7be9\u9078\u6578\u64da\u5eab\uff09<\/h1>\n

\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u7ba1\u7406\u548c\u67e5\u8a62\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6587\u672c\u6578\u64da\u6642\uff0c\u5982\u4f55\u6709\u6548\u5730\u7be9\u9078\u548c\u67e5\u8a62\u9019\u4e9b\u6578\u64da\u6210\u70ba\u4e86\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u7684\u4e00\u9805\u91cd\u8981\u6280\u80fd\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528\u67e5\u8a62\u8a9e\u53e5\u5c0d\u6578\u64da\u5eab\u9032\u884c\u6587\u672c\u7be9\u9078\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6280\u5de7\u3002<\/p>\n

\u6587\u672c\u7be9\u9078\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n

\u6587\u672c\u7be9\u9078\u662f\u6307\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6587\u672c\u6578\u64da\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528 SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u4f86\u7de8\u5beb\u67e5\u8a62\u8a9e\u53e5\u3002SQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u7be9\u9078\u6587\u672c\u6578\u64da\uff0c\u5305\u62ec\u4f7f\u7528 WHERE<\/code> \u5b50\u53e5\u3001\u901a\u914d\u7b26\u3001\u6b63\u5247\u8868\u9054\u5f0f\u7b49\u3002<\/p>\n

\u4f7f\u7528 WHERE \u5b50\u53e5\u9032\u884c\u6587\u672c\u7be9\u9078<\/h2>\n

\u6700\u57fa\u672c\u7684\u6587\u672c\u7be9\u9078\u65b9\u6cd5\u662f\u4f7f\u7528 WHERE<\/code> \u5b50\u53e5\u3002\u9019\u53ef\u4ee5\u7528\u4f86\u67e5\u627e\u7279\u5b9a\u7684\u5b57\u7b26\u4e32\u6216\u6a21\u5f0f\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba users<\/code> \u7684\u8868\u683c\uff0c\u5176\u4e2d\u5305\u542b\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u7be9\u9078\u51fa\u6240\u6709\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u5305\u542b\u300c@example.com\u300d\u7684\u7528\u6236\uff1a<\/p>\n

SELECT * FROM users WHERE email LIKE '%@example.com%';<\/code><\/pre>\n
\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0cLIKE<\/code> \u95dc\u9375\u5b57\u7528\u65bc\u9032\u884c\u6a21\u5f0f\u5339\u914d\uff0c\u800c %<\/code> \u662f\u901a\u914d\u7b26\uff0c\u8868\u793a\u4efb\u610f\u6578\u91cf\u7684\u5b57\u7b26\u3002<\/p>\n
\u4f7f\u7528\u901a\u914d\u7b26\u9032\u884c\u66f4\u9748\u6d3b\u7684\u7be9\u9078<\/h2>\n
\u9664\u4e86 %<\/code> \u901a\u914d\u7b26\u5916\uff0cSQL \u9084\u652f\u6301\u5176\u4ed6\u901a\u914d\u7b26\uff0c\u4f8b\u5982 _<\/code>\uff0c\u5b83\u8868\u793a\u55ae\u500b\u5b57\u7b26\u3002\u9019\u4f7f\u5f97\u6211\u5011\u53ef\u4ee5\u9032\u884c\u66f4\u9748\u6d3b\u7684\u67e5\u8a62\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u67e5\u627e\u6240\u6709\u4ee5\u300cJ\u300d\u958b\u982d\u4e14\u7b2c\u4e8c\u500b\u5b57\u7b26\u70ba\u4efb\u610f\u5b57\u7b26\u7684\u7528\u6236\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n
SELECT * FROM users WHERE username LIKE 'J_';<\/code><\/pre>\n
\u4f7f\u7528\u6b63\u5247\u8868\u9054\u5f0f\u9032\u884c\u9ad8\u7d1a\u7be9\u9078<\/h2>\n
\u5728\u67d0\u4e9b\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\uff0c\u4f8b\u5982 PostgreSQL \u548c MySQL\uff0c\u9084\u53ef\u4ee5\u4f7f\u7528\u6b63\u5247\u8868\u9054\u5f0f\u4f86\u9032\u884c\u66f4\u8907\u96dc\u7684\u6587\u672c\u7be9\u9078\u3002\u9019\u4f7f\u5f97\u6211\u5011\u80fd\u5920\u4f7f\u7528\u66f4\u5f37\u5927\u7684\u6a21\u5f0f\u5339\u914d\u529f\u80fd\u3002\u4f8b\u5982\uff0c\u5728 PostgreSQL \u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 ~<\/code> \u64cd\u4f5c\u7b26\u4f86\u9032\u884c\u6b63\u5247\u8868\u9054\u5f0f\u5339\u914d\uff1a<\/p>\n
SELECT * FROM users WHERE email ~ '^[a-zA-Z0-9._%+-]+@example.com$';<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u7be9\u9078\u51fa\u6240\u6709\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u7b26\u5408\u7279\u5b9a\u683c\u5f0f\u7684\u7528\u6236\u3002<\/p>\n
\u7be9\u9078\u591a\u500b\u689d\u4ef6\u7684\u6587\u672c\u6578\u64da<\/h2>\n
\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6211\u5011\u7d93\u5e38\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u4f86\u7be9\u9078\u6578\u64da\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528 AND<\/code> \u548c OR<\/code> \u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u67e5\u627e\u6240\u6709\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u5305\u542b\u300c@example.com\u300d\u4e14\u7528\u6236\u540d\u4ee5\u300cJ\u300d\u958b\u982d\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n
SELECT * FROM users WHERE email LIKE '%@example.com%' AND username LIKE 'J%';<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u6587\u672c\u7be9\u9078\u662f\u6578\u64da\u5eab\u67e5\u8a62\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u90e8\u5206\uff0c\u638c\u63e1\u5982\u4f55\u4f7f\u7528\u67e5\u8a62\u8a9e\u53e5\u9032\u884c\u6587\u672c\u7be9\u9078\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u66f4\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528 WHERE<\/code> \u5b50\u53e5\u3001\u901a\u914d\u7b26\u548c\u6b63\u5247\u8868\u9054\u5f0f\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u7be9\u9078\u51fa\u6240\u9700\u7684\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u6216 \u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u4f86\u904b\u884c\u6578\u64da\u5eab\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u67e5\u8a62\u7684\u901f\u5ea6\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u4f7f\u7528\u67e5\u8a62\u8a9e\u53e5\u5c0d\u6578\u64da\u5eab\u9032\u884c\u6587\u672c\u7be9\u9078\uff0c\u638c\u63e1\u6709\u6548\u7684\u6578\u64da\u6aa2\u7d22\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5206\u6790\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-175453","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175453","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=175453"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175453\/revisions"}],"predecessor-version":[{"id":175454,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175453\/revisions\/175454"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175453"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175453"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175453"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}