Question

为搜索错误投入了大量时间。我使用了其他两个工作函数作为构建这个的指南，但是，唉，我到目前为止都被打败了。有人能告诉我为什么这会返回语法错误：

FUNCTION FN_USER_MATRIX_PriceTweak 
(
@Cost float, @CostAvg float, 
@Tier1MaxVal float, @Tier1Mult float,
@Tier2MaxVal float, @Tier2Mult float, 
@Tier3MaxVal float, @Tier3Mult float,
@Tier4MaxVal float, @Tier4Mult float, 
@Tier5MaxVal float, @Tier5Mult float, 
@Above5Mult float
)
RETURNS float
AS
BEGIN

DECLARE @Result float

SET @Result = 
(
IF @Cost <= @CostAvg
    CASE
        WHEN @Cost <= @Tier1MaxVal THEN @Cost * @Tier1Mult
        WHEN @Cost <= @Tier2MaxVal THEN @Cost * @Tier2Mult
        WHEN @Cost <= @Tier3MaxVal THEN @Cost * @Tier3Mult
        WHEN @Cost <= @Tier4MaxVal THEN @Cost * @Tier4Mult
        WHEN @Cost <= @Tier5MaxVal THEN @Cost * @Tier5Mult
        ELSE @Cost * @Above5Mult
ELSE    
    CASE
        WHEN @CostAvg <= @Tier1MaxVal THEN @CostAvg * @Tier1Mult
        WHEN @CostAvg <= @Tier2MaxVal THEN @CostAvg * @Tier2Mult
        WHEN @CostAvg <= @Tier3MaxVal THEN @CostAvg * @Tier3Mult
        WHEN @CostAvg <= @Tier4MaxVal THEN @CostAvg * @Tier4Mult
        WHEN @CostAvg <= @Tier5MaxVal THEN @CostAvg * @Tier5Mult
        ELSE @CostAvg * @Above5Mult
)       

RETURN @Result
END

我的错误讯息：

Msg 156，Level 15，State 1，Procedure FN_USER_MATRIX_PriceTweak，Line 21 关键字＆＃39; IF＆＃39;附近的语法不正确。

Msg 156，Level 15，State 1，Procedure FN_USER_MATRIX_PriceTweak，Line 22 关键字＆＃39; CASE＆＃39;附近的语法不正确。

Answer 1

您应该使用嵌套CASE，其中包含IF...ELSE：

SET @Result = 
(
CASE WHEN @Cost <= @CostAvg THEN (
    CASE
        WHEN @Cost <= @Tier1MaxVal THEN @Cost * @Tier1Mult
        WHEN @Cost <= @Tier2MaxVal THEN @Cost * @Tier2Mult
        WHEN @Cost <= @Tier3MaxVal THEN @Cost * @Tier3Mult
        WHEN @Cost <= @Tier4MaxVal THEN @Cost * @Tier4Mult
        WHEN @Cost <= @Tier5MaxVal THEN @Cost * @Tier5Mult
        ELSE @Cost * @Above5Mult END)
ELSE    
    (CASE
        WHEN @CostAvg <= @Tier1MaxVal THEN @CostAvg * @Tier1Mult
        WHEN @CostAvg <= @Tier2MaxVal THEN @CostAvg * @Tier2Mult
        WHEN @CostAvg <= @Tier3MaxVal THEN @CostAvg * @Tier3Mult
        WHEN @CostAvg <= @Tier4MaxVal THEN @CostAvg * @Tier4Mult
        WHEN @CostAvg <= @Tier5MaxVal THEN @CostAvg * @Tier5Mult
        ELSE @CostAvg * @Above5Mult END)
END
)

Answer 2

请试试这个：

IF @Cost <= @CostAvg
BEGIN
    SET @Result =  CASE
        WHEN @Cost <= @Tier1MaxVal THEN @Cost * @Tier1Mult
        WHEN @Cost <= @Tier2MaxVal THEN @Cost * @Tier2Mult
        WHEN @Cost <= @Tier3MaxVal THEN @Cost * @Tier3Mult
        WHEN @Cost <= @Tier4MaxVal THEN @Cost * @Tier4Mult
        WHEN @Cost <= @Tier5MaxVal THEN @Cost * @Tier5Mult
        ELSE @Cost * @Above5Mult
    END
END
ELSE  
BEGIN
    SET @Result =  CASE
        WHEN @CostAvg <= @Tier1MaxVal THEN @CostAvg * @Tier1Mult
        WHEN @CostAvg <= @Tier2MaxVal THEN @CostAvg * @Tier2Mult
        WHEN @CostAvg <= @Tier3MaxVal THEN @CostAvg * @Tier3Mult
        WHEN @CostAvg <= @Tier4MaxVal THEN @CostAvg * @Tier4Mult
        WHEN @CostAvg <= @Tier5MaxVal THEN @CostAvg * @Tier5Mult
        ELSE @CostAvg * @Above5Mult
    END
END

RETURN @Result

Tsql IF ... CASE返回语法错误

2 个答案: