不包含在聚合中或具有。 。

Question

再次返回此查询。所以我以为我用子查询正确地做了这个。 。

use Northwind
Select * From (
SELECT FirstName + ' ' + LastName as 'Full Name',
sum(UnitPrice * Quantity) as 'Total Sales',
YEAR(OrderDate) as SalesYear
From Employees e
Join Orders o on o.EmployeeID = e.EmployeeID
join OrderDetails od on od.OrderID = o.OrderID) as subst
Group by 'Full Name', SalesYear  
Order by 'Total Sales' desc

我得到的错误是“选择列表中的无效，因为它不包含在聚合函数或group by子句中。我之前没有子查询，但它工作正常......。

Answer 1

聚合函数（例如SUM）和分组必须在查询的相同“级别”完成：

use Northwind
Select 'Full Name',SalesYear,SUM(Sale) as 'Total Sales' From (
    SELECT FirstName + ' ' + LastName as 'Full Name',
    UnitPrice * Quantity as Sale,
    YEAR(OrderDate) as SalesYear
    From Employees e
       Join Orders o on o.EmployeeID = e.EmployeeID
       join OrderDetails od on od.OrderID = o.OrderID) as subst
Group by 'Full Name', SalesYear  
Order by 'Total Sales' desc