sql-server - 需要帮助从表创建分类帐

Question

大家..我只是陷入这样的情况，我有两个如下表。第一个表是 tblCharge，第二个表是 tblPayment

chargeId   Plan   TotalAmount
 1         A        400
 2         B        200
 3         C        300 


PaymentId  ChargeId  PayAmount
 1            1       100
 2            1       50
 3            1       70
 4            1       120
 5            1       10
 6            2       50
 7            2       70

我希望通过连接上面的两个表来输出如下所示的结果。应从每行的支付金额中减去总金额。

Plan    Amount  Pay
A       400     100
A       300     50
A       250     70
A       180     120
A       60      10

Answer 1

使用SUM OVER():

SQL Fiddle

SELECT
    c.ChargeId,
    Amount = TotalAmount 
                - SUM(PayAmount) OVER(PARTITION BY c.[Plan] ORDER BY p.PaymentId) 
                + PayAmount,
    p.PayAmount
FROM tblCharge c
INNER JOIN tblPayment p
    ON p.ChargeId = c.ChargeId