{"id":200134,"date":"2025-05-06T11:51:33","date_gmt":"2025-05-06T03:51:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200134\/"},"modified":"2025-05-06T11:51:33","modified_gmt":"2025-05-06T03:51:33","slug":"mysql-%e5%ad%90%e6%9f%a5%e8%af%a2%e5%9f%ba%e6%9c%ac%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200134\/","title":{"rendered":"MySQL \u5b50\u67e5\u8be2\u57fa\u672c\u6307\u5357"},"content":{"rendered":"

<\/b> <\/p>\n

MySQL \u5b50\u67e5\u8be2\u57fa\u672c\u6307\u5357<\/h1>\n

\u672c\u7bc7\u6587\u7ae0\u5411\u5927\u5bb6\u4ecb\u7ecd\u300aMySQL \u5b50\u67e5\u8be2\u57fa\u672c\u6307\u5357\u300b\uff0c\u4e3b\u8981\u5305\u62ec\uff0c\u5177\u6709\u4e00\u5b9a\u7684\u53c2\u8003\u4ef7\u503c\uff0c\u9700\u8981\u7684\u670b\u53cb\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b\u3002<\/p>\n

<\/p>\n

mysql \u5b50\u67e5\u8be2\u662f\u9ad8\u7ea7 sql \u67e5\u8be2\u7684\u57fa\u672c\u7ec4\u6210\u90e8\u5206\uff0c\u652f\u6301\u5d4c\u5957\u6570\u636e\u68c0\u7d22\u4ee5\u83b7\u5f97\u66f4\u7cbe\u7ec6\u7684\u7ed3\u679c\u3002\u8fd9\u662f\u5e2e\u52a9\u60a8\u5165\u95e8\u7684\u7b80\u8981\u6307\u5357\u3002<\/p>\n

\u5b50\u67e5\u8be2\u5141\u8bb8\u60a8\u4ee5\u590d\u6742\u7684\u65b9\u5f0f\u8fc7\u6ee4\u6570\u636e\u3002\u5178\u578b\u7684\u7528\u4f8b\u662f\u5728 select \u8bed\u53e5\u4e2d\uff1a<\/p>\n

select a, b \nfrom table \nwhere x in (select c, d from table2 where y = 'demo');\n<\/pre>\n
\u5b50\u67e5\u8be2\u652f\u6301\u591a\u79cd\u8fd0\u7b97\u7b26\u548c\u51fd\u6570\uff0c\u4f8b\u5982\uff1a<\/p>\n
SELECT a \nFROM table \nWHERE b = (SELECT MAX(c) FROM table2);\n<\/pre>\n
\u8bf7\u8bb0\u4f4f\uff0c\u8fd4\u56de\u591a\u884c\u7684\u5b50\u67e5\u8be2\u5c06\u5bfc\u81f4\u9519\u8bef\uff0c\u9664\u975e\u5904\u7406\u5f97\u5f53\u3002<\/p>\n
 \u5e38\u95ee\u95ee\u9898 <\/h2>\n
\u4ec0\u4e48\u5b9a\u4e49\u4e86\u5b50\u67e5\u8be2\uff1f<\/strong><\/p>\n
\u5b50\u67e5\u8be2\u53ea\u662f\u5d4c\u5957\u67e5\u8be2\uff0c\u7528\u4e8e\u4f18\u5316\u4e3b\u67e5\u8be2\u4e2d\u7684\u6570\u636e\u68c0\u7d22\u3002<\/p>\n
\u4ec0\u4e48\u65f6\u5019\u5e94\u8be5\u4f7f\u7528\u5b50\u67e5\u8be2\uff1f<\/strong><\/p>\n
\u5728\u8de8\u591a\u4e2a\u8868\u8fc7\u6ee4\u6570\u636e\u6216\u5bf9\u540c\u4e00\u6570\u636e\u96c6\u6267\u884c\u591a\u4e2a\u64cd\u4f5c\u65f6\uff0c\u5b83\u4eec\u7279\u522b\u6709\u7528\u3002<\/p>\n
\u5b50\u67e5\u8be2\u7684\u7ed3\u6784\u5982\u4f55\uff1f<\/strong><\/p>\n
\u5b50\u67e5\u8be2\u53ef\u4ee5\u653e\u7f6e\u5728 select\u3001insert\u3001update \u6216 delete \u8bed\u53e5\u4e2d\u4ee5\u589e\u5f3a\u67e5\u8be2\u7075\u6d3b\u6027\u3002<\/p>\n
\u63a2\u7d22\u5206\u533a\u548c\u5176\u4ed6 mysql \u914d\u7f6e\u4ee5\u4f18\u5316\u5b50\u67e5\u8be2\u7684\u6027\u80fd\u3002<\/p>\n
 \u7ed3\u8bba <\/h2>\n
\u5b50\u67e5\u8be2\u662f mysql \u4e2d\u7528\u4e8e\u7ba1\u7406\u590d\u6742\u67e5\u8be2\u7684\u5f3a\u5927\u5de5\u5177\u3002\u5982\u9700\u8fdb\u4e00\u6b65\u9605\u8bfb\uff0c\u8bf7\u8bbf\u95ee mysql \u5b50\u67e5\u8be2\u6307\u5357\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u7684\u5168\u90e8\u5185\u5bb9\u4e86\uff0c\u662f\u5426\u6709\u987a\u5229\u5e2e\u52a9\u4f60\u89e3\u51b3\u95ee\u9898\uff1f\u82e5\u662f\u80fd\u7ed9\u4f60\u5e26\u6765\u5b66\u4e60\u4e0a\u7684\u5e2e\u52a9\uff0c\u8bf7\u5927\u5bb6\u591a\u591a\u652f\u6301\u4e3b\u673a\u5b9d\u8d1d\uff01\u66f4\u591a\u5173\u4e8e\u6570\u636e\u5e93\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4e5f\u53ef\u5173\u6ce8\u4e3b\u673a\u5b9d\u8d1d\u516c\u4f17\u53f7\u3002<\/p>\n
 \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb \u5220\u9664 <\/p>\n
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
MySQL \u5b50\u67e5\u8be2\u57fa\u672c\u6307\u5357 \u672c\u7bc7...<\/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-200134","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200134","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=200134"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200134\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}