交易前滚动余额 SQL Server 2008

Question

我有几个相对简单的表格（下面的示例）。

一个帐户的详细信息位于：

AccountNo     | CurrentBalance*         | ReferredBalance
12345         | £1254.25                | 1500.00

当前余额每小时刷新一次，因此不是静态的

另一个有付款：

Accountno     | TranasctionNo   | TransDate   | Amount |
123456        | 558745489       | 01/01/2015  | £25.99 |
123456        | 558745490       | 01/02/2015  | £25.99 |
123456        | 558745491       | 01/02/2015  | £25.99 |

我的任务是根据收到的付款（包括交易前金额）保持滚动余额。

所以例如我需要一个输出镜像：

AccountNo | TransactionDate | PreTransactionBalance | Amount | Current Balance|
123456    | 01/01/2015      | 1254.25               | 25.99  | 1228.26|
123456    | 01/02/2015      | 1228.26               | 25.99  | 1202.27|
123456    | 01/03/2015      | 1202.27               | 25.99  | 1176.28|
123456    | 01/03/2015      | 1176.28               | -100   | 1276.28|

我添加了负数，因为它需要计算借方和贷方。

无法安静地研究如何使滚动的交易前总计起作用。希望这已经足够清楚了！

Answer 1

您可以使用SUM(amount) OVER()根据TransactionNo滚动amount，然后根据此值计算交易前和当前余额。

示例数据

DECLARE @Account TABLE
(
AccountNo VARCHAR(10) ,
CurrentBalance MONEY,
ReferredBalance MONEY
)

DECLARE @AccountPayment TABLE
(
Accountno VARCHAR(10),TranasctionNo VARCHAR(10),TransDate DATE,Amount MONEY
)
insert into @Account VALUES
('12345','£1254.25','1500.00');

insert into @AccountPayment values
('12345','558745489','01/01/2015','£25.99'),
('12345','558745490','01/02/2015','£25.99'),
('12345','558745491','01/02/2015','£25.99'),
('12345','558745492','01/02/2015','-100');

查询

SELECT AP.AccountNo,
    TransDate,
    A.CurrentBalance - SUM(amount) OVER(ORDER BY TranasctionNo) + amount as PreTransactionBalance ,
    amount,
    A.CurrentBalance - SUM(amount) OVER(ORDER BY TranasctionNo) Current_Balance
FROM @AccountPayment AP
INNER JOIN @Account A
ON AP.Accountno = A.Accountno

编辑

似乎 ORDER BY 在 SQL Server 2008 / SQL Server 2008 R2 中的 SUM() OVER() 中不受支持。根据 msdn

ORDER BY Clause cannot be used with aggregate window functions.

我们可以这样使用CROSS APPLY。

SELECT AP.AccountNo,
    TransDate,
    A.CurrentBalance - pre_amount as PreTransactionBalance ,
    amount,
    A.CurrentBalance - pre_amount - amount Current_Balance
FROM @AccountPayment AP
INNER JOIN @Account A
ON AP.Accountno = A.Accountno
CROSS APPLY
(
     select ISNULL(sum(amount),0) as pre_amount 
     from @AccountPayment ap1 
     where ap1.Accountno = ap.Accountno and ap1.TranasctionNo < ap.TranasctionNo
 ) as b

输出

AccountNo   TransDate   PreTransactionBalance   amount  Prev_Payments
12345   2015-01-01  1254.25 25.99   1228.26
12345   2015-01-02  1228.26 25.99   1202.27
12345   2015-01-02  1202.27 25.99   1176.28
12345   2015-01-02  1176.28 -100.00 1276.28

SQL Fiddle

交易前滚动余额 SQL Server 2008

Pre transaction Rolling balance SQL Server 2008

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