一个关于累加工资的T-SQL语句
<div id="cnblogs_post_body"> 今天在ITPUB看到一个人问的语句问题:http://www.itpub.net/thread-1734957-1-1.html问题如下:
table:emp
parent_id emp_id emp_name total_amout
NULL 2 Andrew 200
2 1 Nancy 100
2 3 Janet 120
3 4 Michael 80
1 5 Robert 50
每个员工的总销售额=自己的销售额+其下级员工的总销售额，
比如：
Andrew = 200_100_120_80_50=550
Nancy = 100+50=150
Janet = 120+80=200
Michael = 80
Robert = 50
这个用SQL怎样可以查询得到，请教一下大家???
我用递归+游标实现了一下，总感觉应该有更好的实现方式，下面是我的实现方式:
<div style="border-bottom: green 1px dashed; border-left: green 2px solid; padding-bottom: 1px; margin-top: 5px; padding-left: 1px; padding-right: 1px; margin-left: 15px; border-top: green 1px dashed; border-right: green 1px dashed; padding-top: 1px; margin-buttom: 5px"> WITH recur(parent_id , emp_id , emp_name , total_amout,tlevel) as ( select parent_id , emp_id , emp_name , total_amout,0 as tlevel from emp as b where parent_id is NULL UNION all SELECT a.parent_id , a.emp_id , a.emp_name , a.total_amout,b.tlevel+1 from emp as a INNER join recur b ON a.parent_id=b.emp_id ) select * INTO emp_ext from recur DECLARE @level int DECLARE @temp int select @level=max(tlevel) FROM emp_ext while(@level>0) begin declare cursor_t cursor local static read_only forward_only for select emp_id from emp_ext where tlevel=@level-1 open cursor_t FETCH NEXT FROM cursor_t into @temp WHILE @@FETCH_STATUS=0 BEGIN print @level update emp_ext set total_amout=(SELECT sum(total_amout) from emp_ext where parent_id=@temp)+(SELECT total_amout from emp_ext where emp_id=@temp) where emp_id=@temp FETCH NEXT FROM cursor_t into @temp END set @level=@level-1 close cursor_t DEALLOCATE cursor_t end
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