题解 | #考试分数(四)#
考试分数(四)
http://www.nowcoder.com/practice/502fb6e2b1ad4e56aa2e0dd90c6edf3c
with job_rank as (
select job,score,count(job) as rk
from grade
group by job
)
select job,
round(if(mod(max(rk),2)=0,max(rk)/2,(max(rk)+1)/2),0) as 'start',
round(if (mod(max(rk),2)=0,max(rk)/2 +1,(max(rk)+1)/2),0) as' end'
from job_rank
group by job
order by job 
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