{"id":76770,"date":"2024-10-16T09:47:16","date_gmt":"2024-10-16T01:47:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76770\/"},"modified":"2024-10-16T09:47:17","modified_gmt":"2024-10-16T01:47:17","slug":"mysql%e9%9a%a8%e6%a9%9f%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76770\/","title":{"rendered":"MySQL\u96a8\u6a5f\u67e5\u8a62\u7684\u5be6\u73fe\u65b9\u6cd5"},"content":{"rendered":"

MySQL\u96a8\u6a5f\u67e5\u8a62\u7684\u5be6\u73fe\u65b9\u6cd5<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u96a8\u6a5f\u67e5\u8a62\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u5c24\u5176\u662f\u5728\u9700\u8981\u5f9e\u5927\u91cf\u6578\u64da\u4e2d\u96a8\u6a5f\u9078\u53d6\u6a23\u672c\u7684\u60c5\u6cc1\u4e0b\u3002MySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u65b9\u6cd5\u4f86\u5be6\u73fe\u96a8\u6a5f\u67e5\u8a62\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u5728MySQL\u4e2d\u5be6\u73fe\u96a8\u6a5f\u67e5\u8a62\u7684\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n

\u65b9\u6cd5\u4e00\uff1a\u4f7f\u7528ORDER BY RAND()<\/h2>\n

\u6700\u7c21\u55ae\u7684\u96a8\u6a5f\u67e5\u8a62\u65b9\u6cd5\u662f\u4f7f\u7528MySQL\u7684 ORDER BY RAND()<\/code> \u8a9e\u53e5\u3002\u9019\u7a2e\u65b9\u6cd5\u6703\u96a8\u6a5f\u6392\u5217\u67e5\u8a62\u7d50\u679c\uff0c\u7136\u5f8c\u8fd4\u56de\u6240\u9700\u7684\u884c\u6578\u3002<\/p>\n

SELECT * FROM your_table ORDER BY RAND() LIMIT 1;<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cyour_table<\/code> \u662f\u4f60\u8981\u67e5\u8a62\u7684\u6578\u64da\u8868\uff0c\u9019\u689d\u8a9e\u53e5\u5c07\u96a8\u6a5f\u9078\u53d6\u4e00\u884c\u6578\u64da\u3002\u96d6\u7136\u9019\u7a2e\u65b9\u6cd5\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u96c6\u6642\uff0c\u6027\u80fd\u53ef\u80fd\u6703\u53d7\u5230\u5f71\u97ff\uff0c\u56e0\u70baMySQL\u9700\u8981\u5c0d\u6574\u500b\u7d50\u679c\u96c6\u9032\u884c\u96a8\u6a5f\u6392\u5e8f\u3002<\/p>\n
\u65b9\u6cd5\u4e8c\uff1a\u4f7f\u7528LIMIT\u548cOFFSET<\/h2>\n
\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u7d50\u5408 LIMIT<\/code> \u548c OFFSET<\/code> \u4f86\u5be6\u73fe\u96a8\u6a5f\u67e5\u8a62\u3002\u9019\u7a2e\u65b9\u6cd5\u9700\u8981\u5148\u8a08\u7b97\u51fa\u6578\u64da\u8868\u4e2d\u7684\u884c\u6578\uff0c\u7136\u5f8c\u96a8\u6a5f\u751f\u6210\u4e00\u500b\u504f\u79fb\u91cf\u3002<\/p>\n
SET @rand_id = FLOOR(1 + RAND() * (SELECT COUNT(*) FROM your_table));\nSELECT * FROM your_table LIMIT 1 OFFSET @rand_id;<\/code><\/pre>\n
\u9019\u88e1\uff0cFLOOR(1 + RAND() * (SELECT COUNT(*) FROM your_table))<\/code> \u6703\u751f\u6210\u4e00\u500b\u96a8\u6a5f\u7684\u884c\u865f\uff0c\u7136\u5f8c\u4f7f\u7528 LIMIT 1 OFFSET @rand_id<\/code> \u4f86\u9078\u53d6\u8a72\u884c\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u6027\u80fd\u4e0a\u901a\u5e38\u6bd4 ORDER BY RAND()<\/code> \u66f4\u512a\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u91cf\u8f03\u5927\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n
\u65b9\u6cd5\u4e09\uff1a\u4f7f\u7528\u5b50\u67e5\u8a62<\/h2>\n
\u9084\u53ef\u4ee5\u4f7f\u7528\u5b50\u67e5\u8a62\u4f86\u5be6\u73fe\u96a8\u6a5f\u67e5\u8a62\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u57fa\u672c\u601d\u8def\u662f\u5148\u5f9e\u6578\u64da\u8868\u4e2d\u96a8\u6a5f\u9078\u53d6\u4e00\u500bID\uff0c\u7136\u5f8c\u518d\u6839\u64da\u9019\u500bID\u67e5\u8a62\u5177\u9ad4\u7684\u6578\u64da\u3002<\/p>\n
SELECT * FROM your_table WHERE id = (SELECT id FROM your_table ORDER BY RAND() LIMIT 1);<\/code><\/pre>\n
\u9019\u7a2e\u65b9\u6cd5\u7684\u512a\u9ede\u5728\u65bc\u53ef\u4ee5\u907f\u514d\u5c0d\u6574\u500b\u7d50\u679c\u96c6\u9032\u884c\u6392\u5e8f\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u4e0d\u904e\uff0c\u9019\u4ecd\u7136\u9700\u8981\u5c0dID\u9032\u884c\u96a8\u6a5f\u9078\u53d6\uff0c\u53ef\u80fd\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u4ecd\u7136\u6703\u5f71\u97ff\u6027\u80fd\u3002<\/p>\n
\u65b9\u6cd5\u56db\uff1a\u4f7f\u7528\u96a8\u6a5f\u6578\u751f\u6210\u5668<\/h2>\n
\u5982\u679c\u4f60\u7684\u6578\u64da\u8868\u6709\u4e00\u500b\u81ea\u589e\u7684\u4e3b\u9375\uff0c\u9084\u53ef\u4ee5\u4f7f\u7528\u96a8\u6a5f\u6578\u751f\u6210\u5668\u4f86\u9078\u53d6\u884c\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u57fa\u672c\u601d\u8def\u662f\u751f\u6210\u4e00\u500b\u96a8\u6a5f\u7684\u4e3b\u9375\u503c\uff0c\u7136\u5f8c\u67e5\u8a62\u8a72\u4e3b\u9375\u5c0d\u61c9\u7684\u884c\u3002<\/p>\n
SET @rand_id = FLOOR(1 + RAND() * (SELECT MAX(id) FROM your_table));\nSELECT * FROM your_table WHERE id >= @rand_id LIMIT 1;<\/code><\/pre>\n
\u9019\u88e1\uff0cMAX(id)<\/code> \u7528\u4f86\u7372\u53d6\u8868\u4e2d\u6700\u5927\u7684ID\uff0c\u7136\u5f8c\u751f\u6210\u4e00\u500b\u96a8\u6a5f\u7684ID\u503c\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u6578\u64da\u8868\u7684ID\u5206\u4f48\u5747\u52fb\u7684\u60c5\u6cc1\u4e0b\u6548\u679c\u8f03\u597d\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728MySQL\u4e2d\u5be6\u73fe\u96a8\u6a5f\u67e5\u8a62\u6709\u591a\u7a2e\u65b9\u6cd5\uff0c\u6bcf\u7a2e\u65b9\u6cd5\u90fd\u6709\u5176\u512a\u7f3a\u9ede\u3002ORDER BY RAND()<\/code> \u96d6\u7136\u7c21\u55ae\uff0c\u4f46\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\u6027\u80fd\u8f03\u5dee\uff1b\u800c\u4f7f\u7528 LIMIT<\/code> \u548c OFFSET<\/code> \u6216\u5b50\u67e5\u8a62\u5247\u80fd\u63d0\u9ad8\u6548\u7387\u3002\u6839\u64da\u5177\u9ad4\u7684\u61c9\u7528\u5834\u666f\uff0c\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528 \u9999\u6e2fVPS<\/a> \u4f86\u90e8\u7f72\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u66f4\u5feb\u7684\u67e5\u8a62\u901f\u5ea6\u548c\u66f4\u7a69\u5b9a\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MySQL\u96a8\u6a5f\u67e5\u8a62\u7684\u5be6\u73fe\u65b9\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u96a8\u6a5f\u9078\u53d6\u8a18\u9304\uff0c\u63d0\u5347\u67e5\u8a62\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-76770","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76770","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=76770"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76770\/revisions"}],"predecessor-version":[{"id":76771,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76770\/revisions\/76771"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}