C# SQL查询使用两个表重叠总和,SQL Server
如果有人能帮我提问,我将不胜感激 我有两个表-C# SQL查询使用两个表重叠总和,SQL Server,c#,sql,sql-server,entity-framework,C#,Sql,Sql Server,Entity Framework,如果有人能帮我提问,我将不胜感激 我有两个表-付款和还款 Payments: Repayments: DATE SUM IS_REPAYED DATE SUM 01/01/15 20 000 0 05/01/15 5 000 06/01/15
付款
和还款
Payments: Repayments:
DATE SUM IS_REPAYED DATE SUM
01/01/15 20 000 0 05/01/15 5 000
06/01/15 10 000
我需要有一个标志,显示付款
金额是否包含在还款
金额中,在这种情况下,如果(5000+10000)包含20000
,则现在不是
但当新增还款时,它是:
Payments: Repayments:
DATE SUM IS_REPAYED DATE SUM
01/01/15 20 000 1 05/01/15 5 000
06/01/15 10 000
07/01/15 5 000
然而,也可能存在这样的情况,当还款
超过付款时,这意味着付款
已偿还,其余5000(25000-20000)
应计算为还款
,用于下一次付款
,即:
Payments: Repayments:
DATE SUM IS_REPAYED DATE SUM
01/01/15 20 000 1 05/01/15 25 000
01/02/15 10 000 0
当新的还款到来时:
Payments: Repayments:
DATE SUM IS_REPAYED DATE SUM
01/01/15 20 000 1 05/01/15 25 000
01/02/15 10 000 1 05/02/15 5 000 (or more, ex. 6 000) then 1 000 goes to the next Payment
还有一种情况是,还款
先到,然后下一次付款应该有一个标志:
Payments: Repayments:
DATE SUM IS_REPAYED DATE SUM
01/03/15 30 000
05/03/15 30 000 1
那么,当我在某个时间使用付款/还款对账单的当前情况查询表时,如何获取该IS_returned
标志?我知道我可以在我的应用程序中为标志创建一个逻辑,这是一个更好的解决方案吗
为了获得上面显示的视图,我使用了完全外部联接
:
SELECT t1.DATE, t1.SUM, NULL AS IS_REPAYED /*?*/, t2.DATE, t2.SUM
FROM
( (SELECT t1.*, row_number() OVER (ORDER BY DATE) as seqnum
FROM Payments t1
) t1
FULL OUTER JOIN
(SELECT t2.*, row_number() OVER (ORDER BY DATE) as seqnum
FROM Repayments t2
) t2
ON t1.seqnum = t2.seqnum
)
嗯,我认为您可以通过下面的sql查询实现这一点
SELECT t1.DATE, SUM(t1.SUM), SUM(t1.SUM) = SUM(t2.SUM) AS IS_REPAYED, t2.DATE, SUM(t2.SUM)
FROM Payments t1 FULL OUTER JOIN Repayments t2 ON t1.DATE = t2.DATE
GROUP BY t1.DATE
1。当还款金额小于或等于当月的付款金额时,更新的
将在付款
表中还款至0或1。
UPDATE PAYMENTS SET IS_REPAYED = S.IS_REPAYED
FROM
(
SELECT P.[DATE],CASE WHEN R.[SUM] = P.[SUM] THEN 1 ELSE 0 END IS_REPAYED
FROM PAYMENTS P
JOIN
(
SELECT CAST(DATEADD(month, DATEDIFF(month, 0, [DATE]), 0)AS DATE) [DATE], SUM([SUM]) [SUM]
FROM REPAYMENTS
GROUP BY CAST(DATEADD(month, DATEDIFF(month, 0, [DATE]), 0)AS DATE)
)R
ON DATEPART(MONTH,P.[DATE]) = DATEPART(MONTH,R.[DATE]) AND R.[SUM] <= P.[SUM]
)S
WHERE PAYMENTS.[DATE]=S.[DATE]
现在我们找到差异并插入到还款表中
INSERT INTO REPAYMENTS
SELECT DATEADD(DAY,1,PAYDATE) [DATE], (RESUM-PAYSUM) REAMOUNT
FROM #NEWTABLE
INSERT INTO PAYMENTS
SELECT DATEADD(MONTH,1,PAYDATE) [DATE], (RESUM+(RESUM-PAYSUM))-PAYSUM REAMOUNT,1
FROM #NEWTABLE
类似地,我们找到差异并插入到付款表中
INSERT INTO REPAYMENTS
SELECT DATEADD(DAY,1,PAYDATE) [DATE], (RESUM-PAYSUM) REAMOUNT
FROM #NEWTABLE
INSERT INTO PAYMENTS
SELECT DATEADD(MONTH,1,PAYDATE) [DATE], (RESUM+(RESUM-PAYSUM))-PAYSUM REAMOUNT,1
FROM #NEWTABLE
由于还款
表中的值大于付款
表中的值,我们直接将表中的值从临时表更新为1
SELECT P.[DATE] PAYDATE ,P.[SUM] PAYSUM ,R.[DATE] REDATE,R.[SUM] RESUM
INTO #NEWTABLE
FROM PAYMENTS P
JOIN
(
SELECT CAST(DATEADD(month, DATEDIFF(month, 0, [DATE]), 0)AS DATE) [DATE], SUM([SUM]) [SUM]
FROM REPAYMENTS
GROUP BY CAST(DATEADD(month, DATEDIFF(month, 0, [DATE]), 0)AS DATE)
)R
ON DATEPART(MONTH,P.[DATE]) = DATEPART(MONTH,R.[DATE]) AND R.[SUM] > P.[SUM]
UPDATE PAYMENTS SET ISREPAYED = 1
FROM
(
SELECT PAYDATE FROM #NEWTABLE
)N
WHERE PAYMENTS.[DATE]=N.PAYDATE
- 查看结果
如果我问的是显而易见的问题,请原谅,但您的意思是想在物理表中添加一个“还款”列,还是只是一个“结果集”列?结果集列最适合,也可以使用“表”类型的变量。请随时询问任何更改:)@Gyuzal r感谢您的耐心和帮助!