题解 | #考试分数(四)#
考试分数(四)
http://www.nowcoder.com/practice/502fb6e2b1ad4e56aa2e0dd90c6edf3c
with t as (
select job
,count(1) num
from grade
group by 1)
select job
,FLOOR((num+1)/2) star
,CEILING((num+1)/2) end
from t
order by 1
