题解 | #牛客考试分数(三)#
考试分数(三)
http://www.nowcoder.com/practice/b83f8b0e7e934d95a56c24f047260d91
with sc_rk as (
select id,language_id,score,dense_rank() over(partition by language_id order by score desc) as rk
from grade
group by id,language_id
)
select a.id,name,score
from sc_rk a
left join language b
on a.language_id=b.id
where rk<=2
group by a.id,name
order by name,score desc,id 
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