SQL Server 2012 中的运行平衡

Question

我正在尝试使用 SQL Server 2012 获得运行平衡

这是我目前得到的...

DECLARE @Transactions TABLE
(
    Amount decimal (18,2),
    TransactionId uniqueidentifier,
    AccountId uniqueidentifier,
    TransactionDate date
)

DECLARE @AccountId uniqueidentifier = NEWID()

INSERT INTO @Transactions (Amount, TransactionId, AccountId, TransactionDate)
SELECT 3224.99, NEWID(), @AccountId, '2013-06-02'

INSERT INTO @Transactions (Amount, TransactionId, AccountId, TransactionDate)
SELECT 18.99, NEWID(), NEWID(), '2013-06-14'

INSERT INTO @Transactions (Amount, TransactionId, AccountId, TransactionDate)
SELECT -8.99, NEWID(), @AccountId, '2013-06-14' 

INSERT INTO @Transactions (Amount, TransactionId, AccountId, TransactionDate)
SELECT -6.99, NEWID(), @AccountId, '2013-06-14'

INSERT INTO @Transactions (Amount, TransactionId, AccountId, TransactionDate)
SELECT -22.14, NEWID(), @AccountId, '2014-11-09'

INSERT INTO @Transactions (Amount, TransactionId, AccountId, TransactionDate)
SELECT -84.99, NEWID(), @AccountId, '2013-06-09'


SELECT  SUM(Amount) OVER (ORDER BY TransactionDate, TransactionId) as [RunningBalance],
        Amount
FROM @Transactions 
WHERE AccountId = @AccountId
ORDER BY TransactionDate DESC

结果是

RunningBalance                          Amount
--------------------------------------- ---------------------------------------
3101.88                                 -22.14
3133.01                                 -6.99
3124.02                                 -8.99
3140.00                                 -84.99
3224.99                                 3224.99

我的目标是让 RunningBalance 显示每个余额，即使是同一天，每一行也应该有自己的余额

如您所见，第二行没有正确显示，我相信这是因为我还有一个与之冲突的第二个帐户 ID，但假设 WHERE 语句会删除它..

我可以删除 ORDER BY，但是我希望我的列表是最新交易，因为最终查询将有分页，我已经尝试过类似的操作..但是余额已关闭...

SELECT * FROM (
SELECT  SUM(Amount) OVER (PARTITION BY AccountId ORDER BY TransactionDate, TransactionId) as [RunningBalance],
        Amount, TransactionDate
FROM @Transactions 
WHERE AccountId = @AccountId
) AS Results
ORDER BY TransactionDate DESC




RunningBalance                          Amount                                  TransactionDate
--------------------------------------- --------------------------------------- ---------------
3101.88                                 -22.14                                  2014-11-09
3131.01                                 -8.99                                   2013-06-14
3124.02                                 -6.99                                   2013-06-14
3140.00                                 -84.99                                  2013-06-09
3224.99                                 3224.99                                 2013-06-02

我不太确定问题是什么......

Answer 1

您需要以其他方式确定正确的顺序，而不是按 TransactionId（一个无意义的 GUID 值，与插入行的时间无关）进行排序。由于您有一个 CreatedOn 列来存储插入该行的日期/时间，因此您应该将其添加到您的 order by 以生成正确的序列。

Answer 2

您对运行余额的排序与结果不同，因此行与您认为应该的方式不一致：

SELECT  SUM(Amount) OVER (ORDER BY TransactionDate, TransactionId) as [RunningBalance],
        Amount
FROM @Transactions 
WHERE AccountId = @AccountId
ORDER BY TransactionDate, TransactionId

如果你想ORDER BY TransactionDate DESC，那么也可以在你的余额中这样做：

SELECT  SUM(Amount) OVER (ORDER BY TransactionDate DESC, TransactionId) as [RunningBalance],
        Amount
FROM @Transactions 
WHERE AccountId = @AccountId

在不同的ORDER BY 条件下，您无法获得有意义的运行平衡。

Answer 3

我认为您需要使用的是 ROWS UNBOUNDED PRECEDING。

SELECT TransactionDate
,Amount
,SUM(Amount) OVER (
    ORDER BY TransactionDate DESC ROWS UNBOUNDED PRECEDING
    ) AS [RunningBalance]
FROM @Transactions
WHERE AccountId = @AccountId