{"id":173237,"date":"2024-11-07T16:19:20","date_gmt":"2024-11-07T08:19:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173237\/"},"modified":"2024-11-07T16:19:21","modified_gmt":"2024-11-07T08:19:21","slug":"%e5%a6%82%e4%bd%95%e5%be%9e-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e7%8d%b2%e5%8f%96%e7%89%b9%e5%ae%9a%e5%ad%97%e6%ae%b5%e7%9a%84%e5%80%bc-mysql-%e6%95%b8%e6%93%9a%e5%ba%ab%e5%8f%96%e5%87%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173237\/","title":{"rendered":"\u5982\u4f55\u5f9e MySQL \u6578\u64da\u5eab\u4e2d\u7372\u53d6\u7279\u5b9a\u5b57\u6bb5\u7684\u503c (mysql \u6578\u64da\u5eab\u53d6\u51fa\u5b57\u6bb5\u7684\u503c)"},"content":{"rendered":"

\u5982\u4f55\u5f9e MySQL \u6578\u64da\u5eab\u4e2d\u7372\u53d6\u7279\u5b9a\u5b57\u6bb5\u7684\u503c<\/h1>\n

\u5728\u73fe\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0cMySQL \u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7121\u8ad6\u662f\u7db2\u7ad9\u3001\u79fb\u52d5\u61c9\u7528\u9084\u662f\u4f01\u696d\u7cfb\u7d71\uff0cMySQL \u90fd\u80fd\u6709\u6548\u5730\u5b58\u5132\u548c\u6aa2\u7d22\u6578\u64da\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5f9e MySQL \u6578\u64da\u5eab\u4e2d\u7372\u53d6\u7279\u5b9a\u5b57\u6bb5\u7684\u503c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u57fa\u672c\u6982\u5ff5<\/h2>\n

\u5728 MySQL \u4e2d\uff0c\u6578\u64da\u4ee5\u8868\u683c\u7684\u5f62\u5f0f\u5b58\u5132\uff0c\u6bcf\u500b\u8868\u7531\u591a\u500b\u884c\u548c\u5217\u7d44\u6210\u3002\u6bcf\u4e00\u5217\u4ee3\u8868\u4e00\u500b\u5b57\u6bb5\uff0c\u800c\u6bcf\u4e00\u884c\u5247\u4ee3\u8868\u4e00\u689d\u8a18\u9304\u3002\u8981\u5f9e\u6578\u64da\u5eab\u4e2d\u7372\u53d6\u7279\u5b9a\u5b57\u6bb5\u7684\u503c\uff0c\u6211\u5011\u901a\u5e38\u4f7f\u7528 SQL \u67e5\u8a62\u8a9e\u8a00\u3002<\/p>\n

\u4f7f\u7528 SELECT \u8a9e\u53e5<\/h2>\n

\u8981\u5f9e MySQL \u6578\u64da\u5eab\u4e2d\u7372\u53d6\u7279\u5b9a\u5b57\u6bb5\u7684\u503c\uff0c\u6700\u5e38\u7528\u7684 SQL \u8a9e\u53e5\u662f SELECT<\/code>\u3002\u9019\u500b\u8a9e\u53e5\u5141\u8a31\u7528\u6236\u6307\u5b9a\u8981\u6aa2\u7d22\u7684\u5b57\u6bb5\u4ee5\u53ca\u6578\u64da\u4f86\u6e90\u7684\u8868\u683c\u3002<\/p>\n

\u57fa\u672c\u8a9e\u6cd5<\/h3>\n
SELECT field1, field2 FROM table_name WHERE condition;<\/code><\/pre>\n
\u5728\u9019\u88e1\uff0cfield1<\/code> \u548c field2<\/code> \u662f\u4f60\u60f3\u8981\u7372\u53d6\u7684\u5b57\u6bb5\u540d\uff0ctable_name<\/code> \u662f\u6578\u64da\u8868\u7684\u540d\u7a31\uff0c\u800c condition<\/code> \u5247\u662f\u7528\u4f86\u904e\u6ffe\u6578\u64da\u7684\u689d\u4ef6\u3002<\/p>\n
\u793a\u4f8b<\/h3>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba users<\/code> \u7684\u8868\u683c\uff0c\u8a72\u8868\u683c\u5305\u542b\u4ee5\u4e0b\u5b57\u6bb5\uff1aid<\/code>\u3001name<\/code>\u3001email<\/code> \u548c age<\/code>\u3002\u5982\u679c\u6211\u5011\u60f3\u8981\u7372\u53d6\u6240\u6709\u7528\u6236\u7684 name<\/code> \u548c email<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n
SELECT name, email FROM users;<\/code><\/pre>\n
\u9019\u5c07\u8fd4\u56de\u6240\u6709\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n
\u4f7f\u7528 WHERE \u5b50\u53e5\u904e\u6ffe\u6578\u64da<\/h2>\n
\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ea\u60f3\u7372\u53d6\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528 WHERE<\/code> \u5b50\u53e5\u4f86\u904e\u6ffe\u7d50\u679c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u53ea\u60f3\u7372\u53d6\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n
SELECT name, email FROM users WHERE age > 18;<\/code><\/pre>\n
\u9019\u5c07\u8fd4\u56de\u6240\u6709\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\u7684\u59d3\u540d\u548c\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u3002<\/p>\n
\u4f7f\u7528 ORDER BY \u6392\u5e8f\u7d50\u679c<\/h2>\n
\u6709\u6642\u5019\uff0c\u6211\u5011\u5e0c\u671b\u6839\u64da\u67d0\u500b\u5b57\u6bb5\u5c0d\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u9019\u53ef\u4ee5\u901a\u904e ORDER BY<\/code> \u5b50\u53e5\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u6309\u5e74\u9f61\u5347\u5e8f\u6392\u5217\u7528\u6236\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n
SELECT name, email FROM users WHERE age > 18 ORDER BY age ASC;<\/code><\/pre>\n
\u9019\u5c07\u8fd4\u56de\u5e74\u9f61\u5927\u65bc 18 \u6b72\u7684\u7528\u6236\uff0c\u4e26\u6309\u5e74\u9f61\u5f9e\u5c0f\u5230\u5927\u6392\u5e8f\u3002<\/p>\n
\u7d50\u5408\u591a\u500b\u689d\u4ef6<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u4f86\u904e\u6ffe\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\u8981\u7372\u53d6\u5e74\u9f61\u5927\u65bc 18 \u6b72\u4e14\u96fb\u5b50\u90f5\u4ef6\u4ee5 “@example.com” \u7d50\u5c3e\u7684\u7528\u6236\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n
SELECT name, email FROM users WHERE age > 18 AND email LIKE '%@example.com';<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u5f9e MySQL \u6578\u64da\u5eab\u4e2d\u7372\u53d6\u7279\u5b9a\u5b57\u6bb5\u7684\u503c\u662f\u4e00\u9805\u57fa\u672c\u800c\u91cd\u8981\u7684\u6280\u80fd\u3002\u901a\u904e\u4f7f\u7528 SELECT<\/code> \u8a9e\u53e5\u3001WHERE<\/code> \u5b50\u53e5\u3001ORDER BY<\/code> \u548c\u908f\u8f2f\u904b\u7b97\u7b26\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u6aa2\u7d22\u6240\u9700\u7684\u6578\u64da\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u9069\u7528\u65bc\u7c21\u55ae\u7684\u67e5\u8a62\uff0c\u9084\u53ef\u4ee5\u64f4\u5c55\u5230\u66f4\u8907\u96dc\u7684\u6578\u64da\u6aa2\u7d22\u9700\u6c42\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u904b\u884c\u60a8\u7684 MySQL \u6578\u64da\u5eab\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u7db2\u7ad9\u9084\u662f\u5927\u578b\u61c9\u7528\uff0c\u6211\u5011\u7684 \u4e91\u670d\u52a1\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u5f9e MySQL \u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u7279\u5b9a\u5b57\u6bb5\u7684\u503c\uff0c\u638c\u63e1\u67e5\u8a62\u8a9e\u53e5\u548c\u6578\u64da\u64cd\u4f5c\u6280\u5de7\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-173237","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173237","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=173237"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173237\/revisions"}],"predecessor-version":[{"id":173238,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173237\/revisions\/173238"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173237"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173237"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173237"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}