我有几个相对简单的表格(下面的例子)。
其中有一个帐户详细信息:
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
另一个人有付款:
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(包括预交易金额)保持滚动余额。
例如,我需要输出镜像:
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。
无法安排如何使滚动的预交易总数发挥作用。希望这很清楚!
答案 0 :(得分:1)
您可以使用SUM(amount) OVER()
根据amount
滚动TransactionNo
,然后根据此值计算事务前和当前余额。
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');
<强>查询强>
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
修改强>
SQL Server 2008 / SQL Server 2008 R2中的ORDER BY
似乎不支持SUM() OVER()
。根据{{3}}
ORDER BY Clause
不能与聚合窗口函数一起使用。
我们可以像这样使用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
<强>输出强>
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