题解 | #考试分数(四)#
考试分数(四)
http://www.nowcoder.com/practice/502fb6e2b1ad4e56aa2e0dd90c6edf3c
select t.job, case when t.num%2=0 then round(t.num/2,0) else round((t.num+1)/2,0) end 'start', case when t.num%2=0 then round(t.num/2+1,0) else round((t.num+1)/2,0) end 'end' from (select job,count(score) num from grade group by job)t order by t.job
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