Question

我目前正致力于SSRS报告，该报告应显示用户定义期间的估计现金流量，例如：提前1年

我的表格如下：

ID  DepositDate  DepositAmt  BalanceDueDate  TotalAmount  
--------------------------------------------------------  
1   02/06/2011   10%         02/07/2011              100
2   16/06/2011   10%         16/07/2011              200
3   08/07/2011   20%         08/08/2011              300
4   15/07/2011   10%         15/08/2011              400

过程

Month  Amount
-------------
06         10 (10% (deposit %) of Total amount for ID 1)
06         20 (10% of Total amount for ID 2)
07         90 (balance amount after deposit from previous month for ID 1)
07        180 (balance amount after deposit from previous month for ID 2)
07         60 (20% of Total amount for ID 3)
07         40 (10% of Total amount for ID 4)
08        240 (balance amount after deposit from previous month for ID 3)
08        360 (balance amount after deposit from previous month for ID 4)

预期输出

Month  Amount
-------------
06         30
07        370
08        600

尝试过CTE的一些疑问，但我迷路了。

任何人都能解释一下吗？

非常感谢

Answer 1

你走了：

SELECT  [Month],
        SUM(Amount) Amount
FROM (  SELECT  MONTH(DepositDate) [Month],
                DepositAmt * TotalAmount Amount
        FROM YourTable

        UNION ALL
        SELECT  MONTH(BalanceDueDate),
                TotalAmount * (1 - DepositAmt)
        FROM YourTable) A
GROUP BY [Month]
ORDER BY [Month]

结果：

╔═══════╦════════╗
║ Month ║ Amount ║
╠═══════╬════════╣
║     6 ║     30 ║
║     7 ║    370 ║
║     8 ║    600 ║
╚═══════╩════════╝

带有演示的

Here is a sqlfiddle。

您应该考虑在结果集上添加年份，否则您可以混合结果。

Answer 2

这是一个可以处理多个月的时间段：

with CashMovements as
(
  select *
    , CashMovement = DepositAmt * TotalAmount
    , CashPaid = DepositAmt * TotalAmount
  from Deposits
  union all
  select ID
    , dateadd(mm,1,DepositDate)
    , DepositAmt
    , BalanceDueDate
    , TotalAmount
    , CashMovement = case when dateadd(Month,1,DepositDate) >= BalanceDueDate
        then TotalAmount - CashPaid
      else DepositAmt * TotalAmount
      end
    , CashPaid = case when dateadd(mm,1,DepositDate) >= BalanceDueDate
        then CashPaid + (DepositAmt * TotalAmount)
      else 0.0
      end
  from CashMovements
  where dateadd(Month,1,DepositDate) <= BalanceDueDate
)
select Month = Month(DepositDate)
  , Amount = sum(CashMovement)
from CashMovements
group by Month(DepositDate)
order by Month

SQL Fiddle with demo

如果您的数据不需要考虑这种情况，最好使用@Lamak的简单解决方案。

SQL Server 2008查询转发现金流量报告

2 个答案: