{"id":200283,"date":"2025-05-06T08:03:56","date_gmt":"2025-05-06T00:03:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/200283\/"},"modified":"2025-05-06T08:03:56","modified_gmt":"2025-05-06T00:03:56","slug":"%e5%a6%82%e4%bd%95%e6%89%93%e4%b9%b1-mysql-%e8%a1%a8%e4%b8%ad%e7%9a%84%e6%95%b0%e6%8d%ae%e9%a1%ba%e5%ba%8f%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/200283\/","title":{"rendered":"\u5982\u4f55\u6253\u4e71 MySQL \u8868\u4e2d\u7684\u6570\u636e\u987a\u5e8f\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u6253\u4e71 MySQL \u8868\u4e2d\u7684\u6570\u636e\u987a\u5e8f\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

<\/p>\n

\u6253\u4e71 mysql \u8868\u4e2d\u7684\u6570\u636e\u987a\u5e8f<\/strong><\/p>\n

\u8bb8\u591a\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u9700\u8981\u5c06\u8868\u4e2d\u7684\u6570\u636e\u91cd\u65b0\u6392\u5217\u6210\u968f\u673a\u987a\u5e8f\uff0c\u4ee5\u6d88\u9664\u6309\u63d2\u5165\u987a\u5e8f\u6392\u5217\u7684\u504f\u597d\u3002\u5728 mysql \u4e2d\uff0c\u6709\u591a\u79cd\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e00\u76ee\u6807\u3002<\/p>\n

\u4f7f\u7528 join \u548c rand() \u51fd\u6570<\/strong><\/p>\n

\u4e00\u79cd\u6709\u6548\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 join \u548c rand() \u51fd\u6570\u3002\u6b64\u65b9\u6cd5\u521b\u5efa\u4e86\u4e00\u4e2a\u4e34\u65f6\u8868\uff0c\u5176\u4e2d\u5305\u542b\u9650\u5236\u4e3a\u7279\u5b9a\u8303\u56f4\u5185\u7684\u968f\u673a\u6392\u5217\u7684 id\u3002\u7136\u540e\uff0c\u4f7f\u7528 join \u5c06\u539f\u59cb\u8868\u4e0e\u4e34\u65f6\u8868\u8fde\u63a5\uff0c\u6839\u636e\u968f\u673a\u5316\u7684 id \u7b5b\u9009\u51fa\u8bb0\u5f55\u3002<\/p>\n

select *\nfrom test1 as u\ninner join (select id from test1 where totalscore between 5 and 100 order by rand() limit 100) as t on t.id=u.id\nwhere 1<\/pre>\n
\u4f7f\u7528 order by rand()<\/strong><\/p>\n
\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528 order by rand() \u5b50\u53e5\u3002\u6b64\u65b9\u6cd5\u76f4\u63a5\u5bf9\u539f\u59cb\u8868\u8fdb\u884c\u968f\u673a\u6392\u5e8f\uff0c\u4f46\u7531\u4e8e mysql \u4e2d\u5404\u79cd\u539f\u56e0\uff0c\u8fd9\u79cd\u65b9\u6cd5\u7684\u6027\u80fd\u53ef\u80fd\u8f83\u5dee\u3002<\/p>\n
SELECT * FROM student WHERE totalScore BETWEEN 5 AND 100 ORDER BY RAND() LIMIT 100;<\/pre>\n
\u6700\u7ec8\uff0c\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u8868\u7684\u5927\u5c0f\u3001\u6570\u636e\u8303\u56f4\u548c\u6240\u9700\u7684\u6027\u80fd\u6c34\u5e73\u3002\u5bf9\u4e8e\u5927\u8868\u6216\u9700\u8981\u9ad8\u6027\u80fd\u7684\u573a\u666f\uff0c\u5efa\u8bae\u4f7f\u7528 join \u65b9\u6cd5\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
\n
\n <\/dt>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u6253\u4e71 MySQL \u8868\u4e2d\u7684\u6570\u636e...<\/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-200283","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200283","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=200283"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/200283\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=200283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=200283"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=200283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}