Question

我正在尝试使用可变条件编写查询。无论如何在不使用联盟的情况下执行以下操作，而是使用另一个表中的日期列表？

SELECT
'2014-03-03' AS SnapshotDate
,T2.Pre_PPI_Cycle
,SUM(ISNULL(T2.Pre_PPI_Balance, 0))AS Pre_Balance
,COUNT(ISNULL(T2.Account_Number, 0)) AS Pre_Volume
,ROW_NUMBER() OVER (PARTITION BY Account_Number 
ORDER BY Account_Number, SnapshotDate DESC) AS ROW
FROM #TABLE_1 AS T2
WHERE T2.SnapshotDate <= '2014-03-03'
GROUP BY T2.SnapshotDate, T2.Pre_PPI_Cycle, Account_Number
UNION
SELECT
'2014-03-04' AS SnapshotDate
,T2.Pre_PPI_Cycle
,SUM(ISNULL(T2.Pre_PPI_Balance, 0))AS Pre_Balance
,COUNT(ISNULL(T2.Account_Number, 0)) AS Pre_Volume
,ROW_NUMBER() OVER (PARTITION BY Account_Number 
ORDER BY Account_Number, SnapshotDate DESC) AS ROW
FROM #PPI_3 AS T2
WHERE T2.SnapshotDate <= '2014-03-04'
GROUP BY T2.SnapshotDate, T2.Pre_PPI_Cycle, Account_Number

修改

感谢目前为止的帮助 - 只是为了澄清 - 这是我现在的代码。

SELECT
 T2.Capture_Date
,T1.Pre_PPI_Cycle
,SUM(ISNULL(T1.Pre_PPI_Balance, 0))AS Pre_Balance
,COUNT(ISNULL(T1.Account_Number, 0)) AS Pre_Volume
,ROW_NUMBER() OVER (PARTITION BY T1.Account_Number 
 ORDER BY T1.Account_Number, T1.SnapshotDate DESC) AS ROW
FROM 
#PPI_3 AS T1
INNER JOIN (SELECT CHILD.Capture_Date
FROM #DATES AS CHILD
WHERE CHILD.Capture_Date <= '2014-03-04') T2
ON T2.Capture_Date = T1.SnapshotDate
GROUP BY T2.Capture_Date, T1.SnapshotDate, T1.Pre_PPI_Cycle, T1.Account_Number

我在下面的评论中提到我希望将日期'2014-03-04'更改为保留在表#DATES中的日期列表。例如，如果日期＆lt; =''2014-03-03'它返回32条记录。如果日期＆lt; =''2014-03-04'它返回55条记录。我想要的是总查询返回87条记录。这就是我正在努力的部分！

感谢大家的帮助 - 感觉我们正在取得进步！

谢谢，Sam

Answer 1

DECLARE @mydate smalldatetime

set @mydate = '2014-03-03';

SELECT
    '2014-03-03' AS SnapshotDate
    ,T2.Pre_PPI_Cycle
    ,SUM(ISNULL(T2.Pre_PPI_Balance, 0))AS Pre_Balance
    ,COUNT(ISNULL(T2.Account_Number, 0)) AS Pre_Volume
    ,ROW_NUMBER() OVER (PARTITION BY Account_Number ORDER BY Account_Number, SnapshotDate      DESC) AS ROW
FROM #TABLE_1 AS T2
INNER JOIN ( SELECT T2.ID, myDate
             FROM #TABLE_1 AS T2
            WHERE T2.SnapshotDate <= @mydate
           ) x
           ON x.myDate = T2.SnapshotDate
           AND x.ID = T2.ID
GROUP BY T2.SnapshotDate, T2.Pre_PPI_Cycle, Account_Number

OR

SELECT
     '2014-03-03' AS SnapshotDate
    ,T2.Pre_PPI_Cycle
    ,SUM(ISNULL(T2.Pre_PPI_Balance, 0))AS Pre_Balance
    ,COUNT(ISNULL(T2.Account_Number, 0)) AS Pre_Volume
    ,ROW_NUMBER() OVER (PARTITION BY Account_Number ORDER BY Account_Number, SnapshotDate DESC) AS ROW
FROM #TABLE_1 AS T2
WHERE T2.SnapshotDate IN ( SELECT myDate
          FROM #TABLE_1 AS T2
          WHERE T2.SnapshotDate <= '2014-03-03' )
GROUP BY T2.SnapshotDate, T2.Pre_PPI_Cycle, Account_Number

根据您的最新动态。我会更容易做到以下几点：

SELECT
 T1.Capture_Date
,T1.Pre_PPI_Cycle
,SUM(ISNULL(T1.Pre_PPI_Balance, 0))AS Pre_Balance
,COUNT(ISNULL(T1.Account_Number, 0)) AS Pre_Volume
,ROW_NUMBER() OVER (PARTITION BY T1.Account_Number 
 ORDER BY T1.Account_Number, T1.SnapshotDate DESC) AS ROW
FROM #PPI_3 AS T1
WHERE T1.Capture_Date IN ( 
    SELECT CHILD.Capture_Date 
    FROM #DATES AS CHILD 
    WHERE CHILD.Capture_Date <= '2014-03-04')
GROUP BY T1.Capture_Date, T1.SnapshotDate, T1.Pre_PPI_Cycle, T1.Account_Number

使用变量而不是UNION查询

1 个答案: