sql 函数中的函数参数 return 值

Question

sql 查看我如何 return 函数中的 return 值进入函数

select 

dbo.fn_CalculatePrice
(
p.Price, 
p.CargoPrice, 
p.Factor, 
p.PointRatio,
null, 
p.OperactivePromoCode, 
SELECT IncludingCargoPrice FROM [dbo].[fn_Parameter](),
SELECT IncludingProductKdv FROM [dbo].[fn_Parameter]()) AS Price 
From Product as p

[dbo].[fn_CalculatePrice] func parameters
(
    @Price money,
    @CargoPrice money,
    @CatFactor decimal(8,4), 
    @PointRatio decimal(8,4),
    @HBFactor decimal(8,4),
    @PromoCode nvarchar(50),
    @includingCargoPrice bit,
    @includingProductKdv bit
)

fn_Parameter func return table
{
IncludingCargoPrice bit,
IncludingProductKdv bit,
}

错误：关键字 'SELECT'

附近的语法不正确

Answer 1

您可以使用以下两种方法中的任何一种：

1) 将每个参数确定为标量变量。

DECLARE @IncludingCargoPrice BIT = (SELECT IncludingCargoPrice FROM [dbo].fn_Parameter())
DECLARE @IncludingProductKdv BIT = (SELECT IncludingProductKdv FROM [dbo].fn_Parameter())

SELECT
    dbo.fn_CalculatePrice(
        p.Price, 
        p.CargoPrice, 
        p.Factor, 
        p.PointRatio,
        null, 
        p.OperactivePromoCode, 
        @IncludingCargoPrice,
        @IncludingProductKdv) AS Price
From 
    Product as p

2) SELECT 直接在您的查询中（必须确保参数 table 只包含一行，否则该函数将针对每个产品多次应用，按参数行） .您可以使用 WHERE 或 INNER JOIN 中的条件过滤行（而不是我作为示例编写的 CROSS JOIN）。

SELECT
    dbo.fn_CalculatePrice(
        p.Price, 
        p.CargoPrice, 
        p.Factor, 
        p.PointRatio,
        null, 
        p.OperactivePromoCode, 
        X.IncludingCargoPrice,
        X.IncludingProductKdv) AS Price
From 
    Product as p
    CROSS JOIN [dbo].fn_Parameter() AS X

sql 函数中的函数参数 return 值

sql function parameter in function return value

sql

tsql

sql-server

sql-function

sql-server-2008