sql - SQL 中 Case 列的乘法

Question

我有一个查询，其中基于案例有两列，我希望乘以 Qty_Sold * UnitPrice 以获得结果

SELECT CASE 
        WHEN RPT_ITM_D.F1034 = 3
            THEN F64
        ELSE 0
        END AS Qty_Sold
    ,CASE 
        WHEN [POS_TAB].F81 = 1
            THEN Cast(CONVERT(DECIMAL(10, 3), F65 / NULLIF(F64, 0)) AS NVARCHAR) * cast(1.15 AS NUMERIC(10, 3))
        ELSE Cast(CONVERT(DECIMAL(10, 3), F65 / NULLIF(F64, 0)) AS NVARCHAR)
        END AS UnitPrice
FROM [dbo].[RPT_ITM_D]
LEFT OUTER JOIN [dbo].[POS_TAB] ON (RPT_ITM_D.F01 = POS_TAB.F01)
LEFT OUTER JOIN [dbo].SDP_TAB ON (POS_TAB.F04 = SDP_TAB.F04)
LEFT OUTER JOIN [dbo].DEPT_TAB ON (SDP_TAB.F03 = DEPT_TAB.F03)
WHERE RPT_ITM_D.F1034 IN (
        3
        ,3012
        )
    AND RPT_ITM_D.F254 = convert(VARCHAR, getdate(), 101)

我已经尝试过This Example但它不起作用。

请指教

请注意，我还需要外连接中的其他表

Answer 1

您可以尝试将 CTE 用作:

With CTE as
(SELECT CASE 
        WHEN RPT_ITM_D.F1034 = 3
            THEN F64
        ELSE 0
        END AS Qty_Sold
    ,CASE 
        WHEN [POS_TAB].F81 = 1
            THEN Cast(CONVERT(DECIMAL(10, 3), F65 / NULLIF(F64, 0)) AS NVARCHAR) * cast(1.15 AS NUMERIC(10, 3))
        ELSE Cast(CONVERT(DECIMAL(10, 3), F65 / NULLIF(F64, 0)) AS NVARCHAR)
        END AS UnitPrice
FROM [dbo].[RPT_ITM_D]
LEFT OUTER JOIN [dbo].[POS_TAB] ON (RPT_ITM_D.F01 = POS_TAB.F01)
LEFT OUTER JOIN [dbo].SDP_TAB ON (POS_TAB.F04 = SDP_TAB.F04)
LEFT OUTER JOIN [dbo].DEPT_TAB ON (SDP_TAB.F03 = DEPT_TAB.F03)
WHERE RPT_ITM_D.F1034 IN (3,3012)
    AND RPT_ITM_D.F254 = convert(VARCHAR, getdate(), 101)
)

SELECT
 (Qty_Sold * UnitPrice) AS result
FROM CTE