{"id":173401,"date":"2024-11-07T17:43:21","date_gmt":"2024-11-07T09:43:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173401\/"},"modified":"2024-11-07T17:43:21","modified_gmt":"2024-11-07T09:43:21","slug":"%e5%a6%82%e4%bd%95%e7%b5%a6sql%e6%9f%a5%e8%a9%a2%e6%b7%bb%e5%8a%a0%e5%90%88%e8%a8%88%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173401\/","title":{"rendered":"\u5982\u4f55\u7d66SQL\u67e5\u8a62\u6dfb\u52a0\u5408\u8a08\u884c"},"content":{"rendered":"

\u5982\u4f55\u7d66SQL\u67e5\u8a62\u6dfb\u52a0\u5408\u8a08\u884c<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL\u67e5\u8a62\u662f\u7528\u4f86\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u548c\u64cd\u4f5c\u6578\u64da\u7684\u4e3b\u8981\u5de5\u5177\u3002\u7576\u6211\u5011\u9700\u8981\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u7e3d\u7d50\u6216\u8a08\u7b97\u6642\uff0c\u6dfb\u52a0\u5408\u8a08\u884c\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728SQL\u67e5\u8a62\u4e2d\u6dfb\u52a0\u5408\u8a08\u884c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u5408\u8a08\u884c\u7684\u6982\u5ff5<\/h2>\n

\u5408\u8a08\u884c\u662f\u6307\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u6dfb\u52a0\u4e00\u884c\uff0c\u7528\u65bc\u986f\u793a\u67d0\u4e9b\u6578\u64da\u7684\u7e3d\u548c\u6216\u5176\u4ed6\u805a\u5408\u8a08\u7b97\u3002\u9019\u901a\u5e38\u7528\u65bc\u5831\u544a\u6216\u6578\u64da\u5206\u6790\u4e2d\uff0c\u4ee5\u4fbf\u5feb\u901f\u4e86\u89e3\u6578\u64da\u7684\u6574\u9ad4\u60c5\u6cc1\u3002<\/p>\n

\u4f7f\u7528GROUP BY\u548cROLLUP<\/h2>\n

\u5728SQL\u4e2d\uff0c\u6700\u5e38\u898b\u7684\u6dfb\u52a0\u5408\u8a08\u884c\u7684\u65b9\u6cd5\u662f\u4f7f\u7528GROUP BY<\/code>\u5b50\u53e5\u7d50\u5408ROLLUP<\/code>\u529f\u80fd\u3002ROLLUP<\/code>\u53ef\u4ee5\u5728\u5206\u7d44\u7684\u57fa\u790e\u4e0a\u81ea\u52d5\u751f\u6210\u5408\u8a08\u884c\u3002<\/p>\n

\u793a\u4f8b\uff1a\u4f7f\u7528ROLLUP<\/h3>\n
SELECT \n    \u90e8\u9580, \n    SUM(\u85aa\u6c34) AS \u7e3d\u85aa\u6c34\nFROM \n    \u54e1\u5de5\nGROUP BY \n    \u90e8\u9580 WITH ROLLUP;\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u54e1\u5de5<\/code>\u8868\u4e2d\u67e5\u8a62\u6bcf\u500b\u90e8\u9580\u7684\u85aa\u6c34\u7e3d\u548c\u3002\u4f7f\u7528WITH ROLLUP<\/code>\u5f8c\uff0c\u67e5\u8a62\u7d50\u679c\u5c07\u5305\u542b\u4e00\u884c\u986f\u793a\u6240\u6709\u90e8\u9580\u85aa\u6c34\u7684\u7e3d\u548c\u3002<\/p>\n
\u4f7f\u7528UNION ALL\u6dfb\u52a0\u5408\u8a08\u884c<\/h2>\n
\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u4f7f\u7528UNION ALL<\/code>\u4f86\u624b\u52d5\u6dfb\u52a0\u5408\u8a08\u884c\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u7528\u65bc\u4e0d\u652f\u6301ROLLUP<\/code>\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u3002<\/p>\n
\u793a\u4f8b\uff1a\u4f7f\u7528UNION ALL<\/h3>\n
SELECT \n    \u90e8\u9580, \n    SUM(\u85aa\u6c34) AS \u7e3d\u85aa\u6c34\nFROM \n    \u54e1\u5de5\nGROUP BY \n    \u90e8\u9580\n\nUNION ALL\n\nSELECT \n    '\u7e3d\u8a08' AS \u90e8\u9580, \n    SUM(\u85aa\u6c34) AS \u7e3d\u85aa\u6c34\nFROM \n    \u54e1\u5de5;\n<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u9996\u5148\u67e5\u8a62\u6bcf\u500b\u90e8\u9580\u7684\u85aa\u6c34\u7e3d\u548c\uff0c\u7136\u5f8c\u4f7f\u7528UNION ALL<\/code>\u6dfb\u52a0\u4e00\u884c\u986f\u793a\u6240\u6709\u90e8\u9580\u7684\u85aa\u6c34\u7e3d\u548c\uff0c\u4e26\u5c07\u90e8\u9580\u540d\u7a31\u8a2d\u7f6e\u70ba\u201c\u7e3d\u8a08\u201d\u3002<\/p>\n
\u4f7f\u7528CASE\u8a9e\u53e5\u6dfb\u52a0\u5408\u8a08\u884c<\/h2>\n
\u5982\u679c\u9700\u8981\u5728\u540c\u4e00\u67e5\u8a62\u4e2d\u986f\u793a\u5408\u8a08\u884c\u548c\u5176\u4ed6\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528CASE<\/code>\u8a9e\u53e5\u4f86\u5be6\u73fe\u3002<\/p>\n
\u793a\u4f8b\uff1a\u4f7f\u7528CASE\u8a9e\u53e5<\/h3>\n
SELECT \n    CASE \n        WHEN \u90e8\u9580 IS NULL THEN '\u7e3d\u8a08' \n        ELSE \u90e8\u9580 \n    END AS \u90e8\u9580, \n    SUM(\u85aa\u6c34) AS \u7e3d\u85aa\u6c34\nFROM \n    \u54e1\u5de5\nGROUP BY \n    \u90e8\u9580\nWITH ROLLUP;\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u5728\u7d50\u679c\u4e2d\u986f\u793a\u6bcf\u500b\u90e8\u9580\u7684\u85aa\u6c34\u7e3d\u548c\uff0c\u4e26\u5728\u6700\u5f8c\u4e00\u884c\u986f\u793a\u201c\u7e3d\u8a08\u201d\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u5728SQL\u67e5\u8a62\u4e2d\u6dfb\u52a0\u5408\u8a08\u884c\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u6280\u5de7\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u7372\u53d6\u6578\u64da\u7684\u6574\u9ad4\u60c5\u6cc1\u3002\u7121\u8ad6\u662f\u4f7f\u7528ROLLUP<\/code>\u3001UNION ALL<\/code>\u9084\u662fCASE<\/code>\u8a9e\u53e5\uff0c\u9019\u4e9b\u65b9\u6cd5\u90fd\u80fd\u6709\u6548\u5730\u5be6\u73fe\u5408\u8a08\u884c\u7684\u9700\u6c42\u3002\u6839\u64da\u5177\u9ad4\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u548c\u9700\u6c42\uff0c\u9078\u64c7\u6700\u5408\u9069\u7684\u65b9\u6cd5\u4f86\u6dfb\u52a0\u5408\u8a08\u884c\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u5206\u6790\u7684\u6548\u7387\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u554f\u984c\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6709\u95dc\u65bc\u9999\u6e2fVPS<\/a>\u548c\u96f2\u4f3a\u670d\u5668<\/a>\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2\u5982\u4f55\u5728SQL\u67e5\u8a62\u4e2d\u6dfb\u52a0\u5408\u8a08\u884c\uff0c\u63d0\u5347\u6578\u64da\u5831\u544a\u7684\u53ef\u8b80\u6027\u548c\u5206\u6790\u80fd\u529b\uff0c\u7c21\u5316\u6578\u64da\u8655\u7406\u904e\u7a0b\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-173401","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173401","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=173401"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173401\/revisions"}],"predecessor-version":[{"id":173402,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/173401\/revisions\/173402"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=173401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=173401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=173401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}