日期:2014-05-17 浏览次数:20458 次
select a.fenlei, count(*), count(*)/(select count(*) from test)*100 as percentage, constitute
from test a, (select fenlei, group_concat(mc,',',cnt) as constitute from
(select fenlei, mc, count(*) as cnt from test group by 1,2) t group by 1) t1
where a.fenlei=t1.fenlei
group by 1