我正在计算帐户数据,该数据可以通过当前行值和先前行值获得。 我的问题是我必须到达两列,两列都是相互链接的,两列都是通过当前行值和先前行值获得的。
我的样本数据
create Table Accounts (SNo int,Groups varchar(10),ToCollect int,Collected int)
insert into Accounts values(1, 'A', 4748, 4650)
insert into Accounts values(2, 'A', 4643, 4582)
insert into Accounts values(3, 'A', 4582, 4482)
insert into Accounts values(4, 'A', 4482, 4415)
insert into Accounts values(5, 'A', 4415, 4330)
insert into Accounts values(6, 'A', 4332, 4241)
insert into Accounts values(7, 'A', 4241, 2246)
insert into Accounts values(8, 'A', 4166, 6000)
insert into Accounts values(9, 'A', 4080, 0)
尝试查询:
Select *,case when ToCollect>Collected then Collected Else ToCollect End Adjusted
,case when Collected>ToCollect then Collected-ToCollect Else 0 End Excess into #1
from Accounts
select a.SNo,a.Groups,a.ToCollect,a.Collected
,case when a.ToCollect>(a.Collected+b.Excess) then a.Collected+b.Excess Else a.ToCollect End Adjusted
,case when a.Collected+b.Excess>a.ToCollect then a.Collected+b.Adjusted-a.ToCollect Else 0 End Excess
from #1 a left join #1 b on a.SNo=b.SNo-1
实际结果:
SNo Groups ToCollect Collected Adjusted Excess
1 A 4748 4650 4650 0
2 A 4643 4582 4582 0
3 A 4582 4482 4482 0
4 A 4482 4415 4415 0
5 A 4415 4330 4330 0
6 A 4332 4241 4241 0
7 A 4241 2246 4080 0
8 A 4166 6000 4166 1834
9 A 4080 0 4080 0
预期结果:
SNo Groups ToCollect Collected Adjusted Balance Excess
1 A 4748 4650 4650 98 0
2 A 4643 4582 4582 61 0
3 A 4582 4482 4482 100 0
4 A 4482 4415 4415 67 0
5 A 4415 4330 4330 85 0
6 A 4332 4241 4241 91 0
7 A 4241 2246 2246 1995 0
8 A 4166 6000 4166 0 1834
9 A 4080 0 1834 2246 0
答案 0 :(得分:1)
这将获得OP想要的结果,但不知道这是否真的是正确的答案:
WITH CTE AS(
SELECT A.SNo,
A.Groups,
A.ToCollect,
A.Collected,
CASE WHEN A.ToCollect > A.Collected THEN A.Collected ELSE A.ToCollect END AS Adjusted,
CASE WHEN A.ToCollect > A.Collected THEN A.ToCollect - A.Collected ELSE 0 END AS Balance,
CASE WHEN A.ToCollect < A.Collected THEN A.Collected - A.ToCollect ELSE 0 END AS Excess,
SUM(CASE WHEN A.ToCollect < A.Collected THEN A.Collected - A.ToCollect ELSE 0 END) OVER (ORDER BY SNo ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING) AS RunningExcess
FROM dbo.Accounts A)
SELECT C.SNo,
C.Groups,
C.ToCollect,
C.Collected,
ISNULL(NULLIF(C.RunningExcess,0),C.Adjusted) AS Adjusted,
C.Balance - ISNULL(C.RunningExcess,0) AS Balance,
C.Excess
FROM CTE C;