sql-server - 在创建函数中使用聚合函数

Question

我使用下面的代码来创建函数但是当我想执行它时发生错误

CREATE FUNCTION getFactorPriceFunction
(
    @factorCode BIGINT
)
RETURNS bigint
AS BEGIN
    RETURN 
    (
        select SUM(price*coun) as total from CustomerFactor inner join CustomerFactorDetails 
        on CustomerFactor.code=CustomerFactorDetails.factorCode inner join ProductDetails on
        ProductDetails.code=CustomerFactorDetails.productDetailsCode
        where factorCode=@factorCode AND final=1
    )
END 

执行：

 select total from getFactorPriceFunction(100)

错误：

无效的对象名称“getFactorPriceFunction”

Answer 1

1. 它被称为dbo.getFactorPriceFunction。

2. 调用是这样的：

   select dbo.getFactorPriceFunction(100) as total
   

Answer 2

既然它是一个scalar value函数，它应该像这样执行

select dbo.getFactorPriceFunction(100)

如果您要返回一张桌子，那么它应该是

select total from dbo.getFactorPriceFunction(100)