Question

我有一个查询，其中我有两个基于Case的列，我希望将Qty_Sold * UnitPrice乘以得到结果

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)

我尝试了This Example，但它无效。

请咨询

请注意，我也需要在外部加入中使用其他表格

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

Answer 2

以这种方式将查询包装到子查询中：

SELECT t.*,
       Qty_Sold * UnitPrice As my_result
FROM (
    SELECT CASE  .....
    ..... your query goes here

) t

SQL中Case列的乘法

2 个答案: