题解 | #考试分数(三)#
考试分数(三)
https://www.nowcoder.com/practice/b83f8b0e7e934d95a56c24f047260d91
select t.id,name,score
from language join (
select id,language_id,score,dense_rank()over(partition by language_id order by score desc) rank_num
from grade
)t
on t.language_id = language.id and rank_num<=2
order by name,score desc