MS-Access iif語句轉換為T-SQL

Question

嘗試轉換訪問iif語句

IIf(FD.[Sales_Value] = 0, 'Component',
    (IIf(FD.[Lines] = 0,    
        IIf(FD.[Sales_Value] = FD.[Gross_Contribution],
            'Composite', 'N'),
        'N')
    )
) AS Composite,

我現在有這個，但是不喜歡

CASE WHEN FD.[Sales_Value] = 0 THEN 'Component'
ELSE CASE WHEN FD.[Lines] = 0 THEN
        CASE WHEN FD.[Sales_Value] = FD.[Gross_Contribution] THEN 'Composite' ELSE 'N' --END
        ELSE
            'N'
        END 
END
    AS Composite

Answer 1

這應該可以工作，可讀性更好：

CASE 
    WHEN FD.[Sales_Value] = 0 THEN 'Component'
    WHEN FD.[Lines] = 0 AND FD.[Sales_Value] = FD.[Gross_Contribution] 
       THEN 'Composite' 
    ELSE 'N'
END
    AS Composite