sql中循环处理当前行数据和上一行数据相加减_MsSql_

 --drop table #temptable create table #temptable ( argument1 int, argument2 int, argument3 datetime ) declare @rowcount int,@argument1 int,@argument2 nvarchar(50),@argument3 datetime set @rowcount=1 set @argument1=1 set @argument2=0 set @argument3=GETDATE() while(@rowcount<100) begin insert into #temptable(argument1,argument2,argument3) values(@argument1,@argument2,@argument3) set @argument1=@argument1 + datepart(day,@argument3) set @argument3=@argument3-1 set @rowcount = @rowcount + 1 end --select * from #temptable declare @lastargument2 int set @lastargument2=0 set @argument2=0 declare _cursor cursor for(select argument1 from #temptable) open _cursor; fetch next from _cursor into @argument2 while @@fetch_status = 0 begin update #temptable set argument2=@argument2+@lastargument2 where current of _cursor set @lastargument2=@argument2 fetch next from _cursor into @argument2 end close _cursor deallocate _cursor --select * from #temptable