适用多条单据,每个单据多条明细,要对每个单据的明细,进行业务处理。循环数据,识别出每个单据的第一条明细。
--create table ABC --( -- A int, -- B int, -- C int --) --insert ABC select ‘1‘,‘20‘,null --insert ABC select ‘1‘,‘10‘,null --insert ABC select ‘2‘,‘15‘,null --insert ABC select ‘2‘,‘5‘,null if exists(select * from sysobjects where id=object_id(N‘tempdb..#ttt‘) ) drop table #ttt DECLARE @sid INT,@sno INT,@preid int,@curid int,@ccid int,@ctotal int select IDENTITY(int,1,1) as fid,* into #ttt from ABC order by A asc, B desc SET @sno=@@rowcount SET @sid=1 set @preid=0 set @ctotal=0 WHILE @sid<=@sno BEGIN select @curid=A from #ttt where fid=@sid select @ccid=B from #ttt where fid=@sid if @preid<>@curid begin set @ctotal=@ccid set @preid=@curid end else begin set @ctotal=@ctotal-@ccid end update #ttt set c=@ctotal where fid=@sid SET @sid=@sid+1 END select * from #ttt drop table #ttt
fid | A | B | C |
1 | 1 | 20 | 20 |
2 | 1 | 10 | 10 |
3 | 2 | 15 | 15 |
4 | 2 | 5 | 10 |
时间: 2024-10-10 14:09:25