Question

SELECT b.BranchName, SUM(SUM(ob.FirstQty + ob.SecondQty))* ps.Price TotalCost
FROM Branch b, Product_Supplier ps, Product p, Supplier s, Order o, Order_Details od
WHERE o.BranchID = b.BranchID
AND o.OrderID = ob.OrderID
AND ob.ProductID = p.ProductID
AND p.FirstSupplierID = s.SupplierID
AND ps.SupplierID = s.SupplierID
AND ps.ProductID = ob.ProductID
AND b.BranchID = 1
AND o.OrderDate >= '2015-01-09'
AND o.OrderDate <= '2015-09-09'
Group By b.BranchName, ps.Price

我不知道如何获得另一笔款项的总和。所有的钥匙都是正确的。如果我删除了这样的第一笔金额， SELECT b.BranchName，SUM（ob.FirstQty + ob.SecondQty）* ps.Price TotalCost 它有效，但它显示多种成本，如100,200,300等。我想要的是这些多种成本的总和（总成本）。

Answer 1

从ps.Price子句中删除GROUP BY，并使用SUM函数内的价格进行乘法（使用一对额外的括号）。

查询变为：

SELECT b.BranchName, SUM((ob.FirstQty + ob.SecondQty) * ps.Price) TotalCost
FROM Branch b, Product_Supplier ps, Product p, Supplier s, Order o, Order_Details od
WHERE o.BranchID = b.BranchID
AND o.OrderID = ob.OrderID
AND ob.ProductID = p.ProductID
AND p.FirstSupplierID = s.SupplierID
AND ps.SupplierID = s.SupplierID
AND ps.ProductID = ob.ProductID
AND b.BranchID = 1
AND o.OrderDate >= '2015-01-09'
AND o.OrderDate <= '2015-09-09'
Group By b.BranchName

在SQL查询中，如何获得另一个SUM的SUM？

1 个答案: