(SELECT T1.[公司],T1.[商品],SUM(T1.[清单数量]) AS [清单数量],SUM(T1.[单价]) AS [单价],SUM(T1.[金额]) AS [金额]
FROM [设备清单] T1
GROUP BY T1.[公司],T1.[商品]) A
LEFT JOIN
(SELECT T2.[公司],T2.[商品],SUM(T2.[申请数量]) AS [申请数量] FROM [采购申请] T2
GROUP BY T2.[公司],T2.[商品]) B
ON A.[公司]=B.[公司] AND A.[商品]=B.[商品]
LEFT JOIN
(SELECT T3.[公司],T3.[商品],SUM(T3.[入库数量]) AS [入库数量] FROM [采购入库] T3
GROUP BY T3.[公司],T3.[商品]) C
ON A.[公司]=C.[公司] AND A.[商品]=C.[商品]
改成这样完美，谢谢大佬:lol:lol:lol:lol 感谢各位大佬的支持~
后边有问题呢欢迎您继续发帖交流:i0tw2:
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