復雜的CASE表達式代碼

Question

我有一個現有的案情陳述需要修改，這給我帶來了麻煩。 現有代碼：

CASE WHEN (DATEDIFF(Day, MAX(ContDataTranDate), ContDataEnd) + 1)
-(DATEDIFF(wk, MAX(ContDataTranDate), ContDataEnd) * 2)  
-(CASE WHEN DATENAME(dw, MAX(ContDataTranDate)) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(dw, ContDataEnd) = 'Saturday' THEN 1 ELSE 0 END) -1  = 1 THEN 1 ELSE 0 END [Shipped1Day]   

我需要補充的是：
我有2個新列，即SOFReleaseDateName和SOFReleaseDateValue 。
我需要更改現有語句以說，當SOFReleaseDateName不為null時，在當前使用ContDataTranDate ELSE的計算中使用SOFReleaseDateValue而不是ContDataTranDate ，請使用ContDataTranDate 。 我嘗試了許多不同的方法。
SOFReleaseDateValue也是一個日期。

Answer 1

只需在檢查SOFReleaseDateName的語句前面添加新的case語句即可

CASE WHEN SOFReleaseDateName IS NOT NULL THEN
   CASE WHEN (DATEDIFF(Day, MAX(SOFReleaseDateValue ), ContDataEnd) + 1)
            -(DATEDIFF(wk, MAX(SOFReleaseDateValue ), ContDataEnd) * 2)  
            -(CASE WHEN DATENAME(dw, MAX(SOFReleaseDateValue )) = 'Sunday' THEN 1 ELSE 0 END)
            -(CASE WHEN DATENAME(dw, ContDataEnd) = 'Saturday' THEN 1 ELSE 0 END) -1  = 1 
        THEN 1 
        ELSE 0
    END
WHEN
    (DATEDIFF(Day, MAX(ContDataTranDate), ContDataEnd) + 1)
    -(DATEDIFF(wk, MAX(ContDataTranDate), ContDataEnd) * 2)  
    -(CASE WHEN DATENAME(dw, MAX(ContDataTranDate)) = 'Sunday' THEN 1 ELSE 0 END)
    -(CASE WHEN DATENAME(dw, ContDataEnd) = 'Saturday' THEN 1 ELSE 0 END) -1  = 1 

    THEN 1 
    ELSE 0 
END [Shipped1Day] 

在SOFReleaseDateName IS NOT NULL情況下，您可能需要ELSE而不是WHEN

CASE WHEN SOFReleaseDateName IS NOT NULL THEN
    CASE WHEN (DATEDIFF(Day, MAX(SOFReleaseDateValue ), ContDataEnd) + 1)
            -(DATEDIFF(wk, MAX(SOFReleaseDateValue ), ContDataEnd) * 2)  
            -(CASE WHEN DATENAME(dw, MAX(SOFReleaseDateValue )) = 'Sunday' THEN 1 ELSE 0 END)
            -(CASE WHEN DATENAME(dw, ContDataEnd) = 'Saturday' THEN 1 ELSE 0 END) -1  = 1 
        THEN 1 
        ELSE 0
    END
ELSE
     CASE WHEN (DATEDIFF(Day, MAX(ContDataTranDate), ContDataEnd) + 1)
            -(DATEDIFF(wk, MAX(ContDataTranDate), ContDataEnd) * 2)  
            -(CASE WHEN DATENAME(dw, MAX(ContDataTranDate)) = 'Sunday' THEN 1 ELSE 0 END)
            -(CASE WHEN DATENAME(dw, ContDataEnd) = 'Saturday' THEN 1 ELSE 0 END) -1  = 1 
        THEN 1 
        ELSE 0 
    END
END [Shipped1Day]  

Answer 2

CASE WHEN (DATEDIFF(Day, MAX(case when SOFReleaseDateName is not null then SOFReleaseDateValue else ContDataTranDate end), ContDataEnd) + 1)
-(DATEDIFF(wk, MAX(case when SOFReleaseDateName is not null then SOFReleaseDateValue else ContDataTranDate end), ContDataEnd) * 2)  
-(CASE WHEN DATENAME(dw, MAX(case when SOFReleaseDateName is not null then SOFReleaseDateValue else ContDataTranDate end)) = 'Sunday' THEN 1 ELSE 0 END)
-(CASE WHEN DATENAME(dw, ContDataEnd) = 'Saturday' THEN 1 ELSE 0 END) -1  = 1 THEN 1 ELSE 0 END [Shipped1Day]