题解 | #考试分数(四)#

考试分数(四)

https://www.nowcoder.com/practice/502fb6e2b1ad4e56aa2e0dd90c6edf3c

 select job,case 
when count(id)%2=0 then round(count(id)/2,0)
when count(id)%2=1 then round((count(id)+1)/2,0)
end as start,
case 
when count(id)%2=0 then round((count(id)/2)+1,0)
when count(id)%2=1 then round((count(id)+1)/2,0)
end as end
from grade 
group by job
order by job asc

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