Question

为什么此查询不起作用？

Select temp.CompanyName from

(
    SELECT  c.CompanyName, o.OrderID, 
            YEAR(o.OrderDate)  As YEAR, 
            Sum(od.UnitPrice * od.Quantity) from Orders o 
        INNER JOIN [Order Details] od 
            ON o.OrderID = od.OrderID
        INNER JOIN Customers c
            On c.CustomerID = o.CustomerID
                GROUP BY o.OrderId,c.CompanyName, YEAR(o.OrderDate)

) As temp;

它使用Northwind数据库。如果我在没有创建临时视图的情况下运行它，即如果我运行仅包含在圆括号内的查询，则运行正常。

Answer 1

第一次看我会说因为你的Sum（）没有列别名

Answer 2

试试这个：

Select CompanyName from
(
    SELECT  c.CompanyName, o.OrderID, 
            YEAR(o.OrderDate)  As YEAR, 
            Sum(od.UnitPrice * od.Quantity) as price from Orders o 
        INNER JOIN [Order Details] od 
            ON o.OrderID = od.OrderID
        INNER JOIN Customers c
            On c.CustomerID = o.CustomerID
                GROUP BY o.OrderId,c.CompanyName, YEAR(o.OrderDate)

)  temp

Sql Server查询不能作为子查询工作

2 个答案: