{"id":54434,"date":"2025-08-13T06:49:52","date_gmt":"2025-08-12T22:49:52","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/54434.html"},"modified":"2025-08-13T06:49:52","modified_gmt":"2025-08-12T22:49:52","slug":"oracle-unpivot-%e5%88%97%e8%bd%ac%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/54434.html","title":{"rendered":"[Oracle] UNPIVOT \u5217\u8f6c\u884c"},"content":{"rendered":"

Oracle\u6570\u636e\u5e93\u4e2d\u7684UNPIVOT<\/span>\u662f\u4e00\u79cd\u7528\u4e8e\u5c06\u5217\u8f6c\u6362\u4e3a\u884c\u7684SQL\u64cd\u4f5c，\u5b83\u5141\u8bb8\u7528\u6237\u5c06\u591a\u4e2a\u5217\u7684\u6570\u636e\u8f6c\u6362\u4e3a\u591a\u884c\u7684\u5f62\u5f0f，\u4ee5\u4fbf\u8fdb\u884c\u66f4\u7075\u6d3b\u7684\u6570\u636e\u5206\u6790\u548c\u62a5\u8868\u751f\u6210<\/p>\n

UNPIVOT\u4e3b\u8981\u7528\u4e8e\u5c06\u5bbd\u8868(\u591a\u5217)\u8f6c\u6362\u4e3a\u957f\u8868(\u591a\u884c)，\u51cf\u5c11\u8868\u7684\u5217\u6570，\u589e\u52a0\u884c\u6570<\/p>\n

\u8bed\u6cd5\u683c\u5f0f<\/span><\/p>\n

SELECT pivot_column, value_column
\nFROM
\n (SELECT column1, column2, column3, …
\n FROM table_name)
\nUNPIVOT (
\n value_column FOR pivot_column IN (column1 AS alias1, column2 AS alias2, …)
\n)<\/p>\n

\u53c2\u6570\u8bf4\u660e<\/p>\n

value_column：\u5b58\u653e\u539f\u5217\u503c\u7684\u65b0\u5217\u540d
\npivot_column：\u5b58\u653e\u539f\u5217\u540d\u7684\u65b0\u5217\u540d，\u662f\u8f6c\u6362\u540e\u884c\u6570\u636e\u4e2d\u5217\u6807\u9898(\u5373\u539f\u5217\u540d)\u6240\u5728\u7684\u5217\u7684\u540d\u79f0
\nIN\u5b50\u53e5\u4e2d\u5217\u51fa\u4e86\u9700\u8981\u88ab\u8f6c\u6362\u7684\u5217，\u4ee5\u53ca\u5b83\u4eec\u8f6c\u6362\u540e\u7684\u522b\u540d(\u53ef\u9009)<\/p>\n

\u793a\u4f8b<\/span><\/p>\n

\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u540d\u4e3asale_data\u7684\u8868，\u5176\u7ed3\u6784\u5982\u4e0b：<\/p>\n\n\n\n\n\n
product_id<\/td>\njan_sales<\/td>\nfeb_sales<\/td>\nmar_sales<\/td>\n<\/tr>\n
1<\/td>\n1000<\/td>\n1500<\/td>\n2000<\/td>\n<\/tr>\n
2<\/td>\n800<\/td>\n1200<\/td>\n1800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6211\u4eec\u60f3\u8981\u5c06\u8fd9\u4e9b\u9500\u552e\u6570\u636e\u8f6c\u6362\u4e3a\u591a\u884c\u7684\u5f62\u5f0f，\u4ee5\u4fbf\u8fdb\u884c\u66f4\u65b9\u4fbf\u7684\u6570\u636e\u5206\u6790，\u53ef\u4ee5\u4f7f\u7528UNPIVOT\u6765\u5b9e\u73b0\u8fd9\u4e00\u8f6c\u6362，\u5177\u4f53\u7684SQL\u8bed\u53e5\u5982\u4e0b：<\/p>\n

SELECT product_id, month, sales
\nFROM
\n (SELECT product_id, jan_sales, feb_sales, mar_sales
\n FROM sale_data)
\nUNPIVOT
\n (sales FOR month IN (jan_sales AS 'January', feb_sales AS 'February', mar_sales AS 'March'))<\/p>\n

\u6267\u884c\u4e0a\u8ff0SQL\u8bed\u53e5\u540e，\u5c06\u5f97\u5230\u4ee5\u4e0b\u7ed3\u679c：<\/p>\n\n\n\n\n\n\n\n\n\n
product_id<\/td>\nmonth<\/td>\nsales<\/td>\n<\/tr>\n
1<\/td>\nJanuary<\/td>\n1000<\/td>\n<\/tr>\n
1<\/td>\nFebuary<\/td>\n1500<\/td>\n<\/tr>\n
1<\/td>\nMarch<\/td>\n2000<\/td>\n<\/tr>\n
2<\/td>\nJanuary<\/td>\n800<\/td>\n<\/tr>\n
2<\/td>\nFebuary<\/td>\n1200<\/td>\n<\/tr>\n
2<\/td>\nMarch<\/td>\n1800<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u63d0\u793aTips<\/span><\/p>\n

\u2460\u00a0\u6e90\u8868\u6570\u636e\u5217\u7684\u6570\u636e\u7c7b\u578b\u9700\u8981\u4fdd\u6301\u4e00\u81f4，\u5426\u5219\u53ef\u80fd\u4f1a\u51fa\u73b0\u8f6c\u6362\u5931\u8d25\u7684\u60c5\u51b5<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb328\u6b21\u3002\u672c\u6587\u4e3b\u8981\u8bb2\u89e3Oracle\u6570\u636e\u5e93\u4e2d\u7684UNPIVOT \u5217\u8f6c\u884c\u7684\u76f8\u5173\u77e5\u8bc6\u70b9<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[604,100],"topic":[],"class_list":["post-54434","post","type-post","status-publish","format-standard","hentry","category-server","tag-oracle","tag-100"],"yoast_head":"\n[Oracle] UNPIVOT \u5217\u8f6c\u884c - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/54434.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Oracle] UNPIVOT \u5217\u8f6c\u884c - 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