如何在新建记录的同时计算累计值?
假设表结构如下:
id orgID date Amount totalAmount
1 1001 2012-2-1 20 20
2 1002 2012-2-1 10 10
3 1003 2012-2-1 5 5
4 1001 2012-2-2 10 30
5 1002 2012-2-3 10 20
6 1003 2012-2-4 5 10
......
即在插入一条新记录时,自动计算出同一ORGID的累计值。用触发器可以不?如何实现?
[解决办法]
exec cs#'$tblid orgID date Amount1 1001 2012-2-1 202 1002 2012-2-1 103 1003 2012-2-1 54 1001 2012-2-2 105 1002 2012-2-3 106 1003 2012-2-4 5'--> 测试数据:[tbl]if object_id('[tbl]') is not null drop table [tbl]gocreate table [tbl]([id] int,[orgID] int,[date] datetime,[Amount] int)goinsert [tbl]select 1,1001,'2012-2-1',20 union allselect 2,1002,'2012-2-1',10 union allselect 3,1003,'2012-2-1',5 union allselect 4,1001,'2012-2-2',10 union allselect 5,1002,'2012-2-3',10 union allselect 6,1003,'2012-2-4',5;with tas(select ROW_NUMBER()Over(PARTITION by [orgID] order by getdate())as num,*,Amount as total from tbl),mas(select num,id,orgID,[date],Amount,total from t where num=1union allselect a.num,a.id,a.orgID,a.[date],a.Amount,b.total+a.Amount from t ainner join m bon a.num=b.num+1 and a.orgID=b.orgID)select id, orgID, [date], Amount, total from m order by orgID/*id orgID date Amount total1 1001 2012-02-01 00:00:00.000 20 204 1001 2012-02-02 00:00:00.000 10 302 1002 2012-02-01 00:00:00.000 10 205 1002 2012-02-03 00:00:00.000 10 103 1003 2012-02-01 00:00:00.000 5 56 1003 2012-02-04 00:00:00.000 5 10*/这个就是统计数据,你可以给它写到触发器里面
[解决办法]
create PROCEDURE xxx_SP@BatchNo NVARCHAR(50)ASdeclare @orgID nvarchar(10)declare @Cur cursor begin SET @Cur = CURSOR FOR (SELECT orgID FROM dt where BatchNo=@BatchNo) OPEN @Cur FETCH NEXT FROM @Cur INTO @orgID WHILE(@@FETCH_STATUS = 0) BEGIN update dt set totalAmount = select sum (Amount ) from dt where orgID=@orgID group by Amount where BatchNo=@BatchNo and orgID=@orgID end