题解 | #SQL类别高难度试卷得分的截断平均值#
SQL类别高难度试卷得分的截断平均值
https://www.nowcoder.com/practice/a690f76a718242fd80757115d305be45
select
b.tag,
b.difficulty,
round(avg(a.score),1) as clip_avg_score
from
exam_record a
left join
examination_info b on a.exam_id = b.exam_id
where
b.difficulty = 'hard' and b.tag = 'SQL'
and a.score < (select max(score) from exam_record)
and a.score > (select min(score) from exam_record)
group by
1,2
