Question

我有4个表（A，B，C，D），其中包含列日期和金额（无ID）

我需要像波纹管一样的结果表。每个表总和（金额）按日期分组。我尝试了很多选择和加入查询，但没有得到确切的结果。帮助我

表A

date              amount
____________________________
03/07/2015        100
03/07/2015        200
04/07/2015        300

表B

date              amont
____________________________
04/07/2015        300

表C

date
____________________________
05/07/2015        400

表D

date
____________________________
06/07/2015        500
06/07/2015        300

结果表

date            Sum(A)      Sum(B)     Sum(C)    Sum(D)   Total
_______________________________________________________________
03/07/2015      300          -           -         -       300
04/07/2015      300          300         -         -       600
05/07/2015      -            -          400        -       400
06/07/2015      -            -           -         800     800  
_______________________________________________________________
ToTal:          600          300        400        800     2100

Answer 1

您可以先UNION ALL每个表的行，然后添加其他列tbl以确定记录的来源。

WITH CteUnion([date], amount, tbl) AS(
    SELECT [date], amount, 'A' FROM A UNION ALL
    SELECT [date], amount, 'B' FROM B UNION ALL
    SELECT [date], amount, 'C' FROM C UNION ALL
    SELECT [date], amount, 'D' FROM D
)
SELECT
    [date],
    A = SUM(CASE WHEN tbl = 'A' THEN amount END),
    B = SUM(CASE WHEN tbl = 'B' THEN amount END),
    C = SUM(CASE WHEN tbl = 'C' THEN amount END),
    D = SUM(CASE WHEN tbl = 'D' THEN amount END),
    Total = SUM(amount)
FROM CteUnion
GROUP BY [date]

使用子查询，而不是CTE：

SELECT
    [date],
    A = SUM(CASE WHEN tbl = 'A' THEN amount END),
    B = SUM(CASE WHEN tbl = 'B' THEN amount END),
    C = SUM(CASE WHEN tbl = 'C' THEN amount END),
    D = SUM(CASE WHEN tbl = 'D' THEN amount END),
    Total = SUM(amount)
FROM (
    SELECT [date], amount, 'A' AS tbl FROM A UNION ALL
    SELECT [date], amount, 'B' FROM B UNION ALL
    SELECT [date], amount, 'C' FROM C UNION ALL
    SELECT [date], amount, 'D' FROM D
)t
GROUP BY [date]

具有group by和sum（）的多个选择查询

1 个答案: