日期:2014-05-18 浏览次数:20496 次
create table #tab(sn int identity,sl int,aa varchar(10))
insert into #tab(sl) select 5 union all select 8 union all select 10 union all select 25 union all select 30
select a.*,convert(float,a.sl)*100/b.sum_sl 'sl%' from #tab a,(select sum_sl=sum(sl) from #tab) b
where (select sum(sl) from (select a.sn,convert(float,a.sl)*100/b.sum_sl sl from #tab a,(select sum_sl=sum(sl) from #tab) b) c where c.sn <=a.sn) <=80
--结果
sn sl aa sl%
----------- ----------- ---------- -----------------------------------------------------
1 5 NULL 6.4102564102564106
2 8 NULL 10.256410256410257
3 10 NULL 12.820512820512821
4 25 NULL 32.051282051282051
(所影响的行数为 4 行)