SQL Server迭代求和

drop table t_geovindu

create table t_geovindu
(
	xid int IDENTITY (1, 1),
	price money,
	DebitCredit VARCHAR(2),
	adate datetime default(getdate())
	
)

insert into t_geovindu(DebitCredit,price) values('C',10)
insert into t_geovindu(DebitCredit,price) values('C',25)
insert into t_geovindu(DebitCredit,price) values('C',36)
insert into t_geovindu(DebitCredit,price) values('C',66)
insert into t_geovindu(DebitCredit,price) values('D',-11)
insert into t_geovindu(DebitCredit,price) values('C',32)
insert into t_geovindu(DebitCredit,price) values('D',-50)


--
select a.xid, a.price,
 (select sum(price) from t_geovindu b where b.xid <= a.xid) as Balance,DebitCredit  
from t_geovindu a

--
select xid, price, 
 (case  when Balance  is null then price else Balance  end ) as Balance 
from
 (select a.xid, (select  sum(price) from t_geovindu b where b.xid < a.xid)  as Balance  , a.price
from t_geovindu a)  x
--

select  sum(price) from t_geovindu b where (b.xid < a.xid)

select a.xid, (select  sum(price) from t_geovindu b where b.xid < a.xid)  as Balance  , a.price
from t_geovindu a

---
create function mysum(@xh int, @price int) returns int
begin
   return (select 
           (case when Balance  is null then @price  else Balance  end) as Balance  
          from ( select  sum(price) as Balance  from t_geovindu where xid < @xh) x)
end
---
select xid, price, dbo.mysum(xid, price)  as Balance 
from t_geovindu







create table vipnoDly
(
	VID Int IDENTITY (1, 1) PRIMARY KEY, invoiceno nvarchar(50),indate datetime, vipno nvarchar(50),amount int,dcr nvarchar(20)
)
go

SET IDENTITY_INSERT [dbo].vipnoDly ON 
Insert vipnoDly(invoiceno,indate,vipno,amount,dcr) Select invoiceno,indate,vipno,amount,dcr From vipdly AS A Where vipno='geovindu' order by A.indate

select * from vipnoDly

--SET IDENTITY_INSERT dbo.Tool ON


Create Function [dbo].[GetVipNoDlyList]
(
	@ID nvarchar(20)
)
Returns @Tree Table (VID Int IDENTITY (1, 1), invoiceno nvarchar(50),indate datetime, vipno nvarchar(50),amount int,dcr nvarchar(20))
As
Begin
Insert @Tree(invoiceno,indate,vipno,amount,dcr) Select invoiceno,indate,vipno,amount,dcr From vipdly AS A Where vipno=@ID order by A.indate
Return
End
GO

select * from [dbo].[GetVipNoDlyList] ('geovindu') as a order by indate

---SQL Server聚合函数和子查询迭代求和
---如果ID不是第一條記錄，會出現第一行統計合計有問題，所以需查詢生成一個新的ID增長記錄
---銷售單號碼  銷售單日期 所得/已使用積分 可用積分 積分類別 
select a.invoiceno as '銷售單號碼', a.indate as '銷售單日期',a.amount as '所得/已使用積分',
 (select sum(amount) from [dbo].[GetVipNoDlyList] ('geovindu') b where b.VID <= a.VID) as '可用積分',a.dcr as '積分類別'  
from [dbo].[GetVipNoDlyList] ('geovindu') a