{"id":75818,"date":"2024-10-16T01:29:14","date_gmt":"2024-10-15T17:29:14","guid":{"rendered":"https:\/\/server.hk\/cnblog\/75818\/"},"modified":"2024-10-16T01:29:14","modified_gmt":"2024-10-15T17:29:14","slug":"mysql-%e6%9f%a5%e8%a9%a2%e5%89%8d%e5%b9%be%e6%a2%9d%e8%a8%98%e9%8c%84%e7%9a%84%e5%af%a6%e7%8f%be%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/75818\/","title":{"rendered":"MySQL \u67e5\u8a62\u524d\u5e7e\u689d\u8a18\u9304\u7684\u5be6\u73fe\u65b9\u6cd5"},"content":{"rendered":"

MySQL \u67e5\u8a62\u524d\u5e7e\u689d\u8a18\u9304\u7684\u5be6\u73fe\u65b9\u6cd5<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL \u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7cfb\u7d71\u3002\u7576\u6211\u5011\u9700\u8981\u5f9e\u6578\u64da\u8868\u4e2d\u63d0\u53d6\u7279\u5b9a\u6578\u91cf\u7684\u8a18\u9304\u6642\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u67e5\u8a62\u524d\u5e7e\u689d\u8a18\u9304\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u5728 MySQL \u4e2d\u5be6\u73fe\u6b64\u529f\u80fd\u7684\u65b9\u6cd5\u3002<\/p>\n

\u4f7f\u7528 LIMIT \u5b50\u53e5<\/h2>\n

\u6700\u5e38\u898b\u7684\u65b9\u6cd5\u662f\u4f7f\u7528 LIMIT<\/code> \u5b50\u53e5\u3002\u9019\u500b\u5b50\u53e5\u5141\u8a31\u7528\u6236\u6307\u5b9a\u67e5\u8a62\u7d50\u679c\u4e2d\u8fd4\u56de\u7684\u8a18\u9304\u6578\u91cf\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684\u793a\u4f8b\uff1a<\/p>\n

SELECT * FROM \u8868\u540d LIMIT 5;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u8868\u4e2d\u524d\u4e94\u689d\u8a18\u9304\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cLIMIT<\/code> \u7684\u4f7f\u7528\u901a\u5e38\u8207 ORDER BY<\/code> \u5b50\u53e5\u7d50\u5408\uff0c\u4ee5\u78ba\u4fdd\u8fd4\u56de\u7684\u8a18\u9304\u662f\u6709\u5e8f\u7684\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM \u8868\u540d ORDER BY \u5217\u540d ASC LIMIT 5;<\/code><\/pre>\n
\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u6839\u64da\u6307\u5b9a\u7684\u5217\u540d\u4ee5\u5347\u5e8f\u6392\u5217\uff0c\u4e26\u8fd4\u56de\u524d\u4e94\u689d\u8a18\u9304\u3002<\/p>\n
\u4f7f\u7528 OFFSET \u5b50\u53e5<\/h2>\n
\u9664\u4e86 LIMIT<\/code>\uff0cMySQL \u9084\u652f\u6301 OFFSET<\/code> \u5b50\u53e5\uff0c\u9019\u4f7f\u5f97\u7528\u6236\u53ef\u4ee5\u5f9e\u7279\u5b9a\u4f4d\u7f6e\u958b\u59cb\u8fd4\u56de\u8a18\u9304\u3002\u9019\u5728\u9700\u8981\u5206\u9801\u67e5\u8a62\u6642\u7279\u5225\u6709\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
SELECT * FROM \u8868\u540d LIMIT 5 OFFSET 10;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u5c07\u8df3\u904e\u524d\u5341\u689d\u8a18\u9304\uff0c\u7136\u5f8c\u8fd4\u56de\u63a5\u4e0b\u4f86\u7684\u4e94\u689d\u8a18\u9304\u3002\u9019\u5c0d\u65bc\u5be6\u73fe\u5206\u9801\u529f\u80fd\u975e\u5e38\u6709\u7528\u3002<\/p>\n
\u4f7f\u7528 ROW_NUMBER() \u51fd\u6578<\/h2>\n
\u5728 MySQL 8.0 \u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 ROW_NUMBER()<\/code> \u51fd\u6578\u4f86\u70ba\u67e5\u8a62\u7d50\u679c\u4e2d\u7684\u6bcf\u4e00\u884c\u5206\u914d\u4e00\u500b\u552f\u4e00\u7684\u884c\u865f\u3002\u9019\u6a23\u53ef\u4ee5\u66f4\u9748\u6d3b\u5730\u9078\u64c7\u524d\u5e7e\u689d\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
SELECT *, ROW_NUMBER() OVER (ORDER BY \u5217\u540d) AS row_num\nFROM \u8868\u540d\nWHERE row_num <= 5;<\/code><\/pre>\n
\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6839\u64da\u6307\u5b9a\u5217\u540d\u6392\u5e8f\u5f8c\u7684\u524d\u4e94\u689d\u8a18\u9304\u3002<\/p>\n
\u4f7f\u7528\u5b50\u67e5\u8a62<\/h2>\n
\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u4f7f\u7528\u5b50\u67e5\u8a62\u4f86\u7372\u53d6\u524d\u5e7e\u689d\u8a18\u9304\u3002\u9019\u7a2e\u65b9\u6cd5\u53ef\u4ee5\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u63d0\u4f9b\u66f4\u5927\u7684\u9748\u6d3b\u6027\u3002\u4f8b\u5982\uff1a<\/p>\n
SELECT * FROM (SELECT * FROM \u8868\u540d ORDER BY \u5217\u540d LIMIT 5) AS temp;<\/code><\/pre>\n
\u9019\u689d\u67e5\u8a62\u9996\u5148\u5728\u5b50\u67e5\u8a62\u4e2d\u7372\u53d6\u524d\u4e94\u689d\u8a18\u9304\uff0c\u7136\u5f8c\u5728\u5916\u90e8\u67e5\u8a62\u4e2d\u8fd4\u56de\u9019\u4e9b\u8a18\u9304\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u5728 MySQL \u4e2d\u67e5\u8a62\u524d\u5e7e\u689d\u8a18\u9304\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u6700\u5e38\u7528\u7684\u5305\u62ec\u4f7f\u7528 LIMIT<\/code> \u548c OFFSET<\/code> \u5b50\u53e5\u3001ROW_NUMBER()<\/code> \u51fd\u6578\u4ee5\u53ca\u5b50\u67e5\u8a62\u3002\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u548c\u9748\u6d3b\u6027\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\u6258\u7ba1\u60a8\u7684 MySQL \u6578\u64da\u5eab\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u61c9\u7528\u63d0\u4f9b\u7a69\u5b9a\u7684\u6027\u80fd\u548c\u5b89\u5168\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3 MySQL \u67e5\u8a62\u524d\u5e7e\u689d\u8a18\u9304\u7684\u5be6\u73fe\u65b9\u6cd5\uff0c\u638c\u63e1 LIMIT \u548c OFFSET \u7684\u7528\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\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-75818","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75818","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=75818"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75818\/revisions"}],"predecessor-version":[{"id":75819,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/75818\/revisions\/75819"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=75818"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=75818"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=75818"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}