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 tag,difficulty,round((sum(score)-max(score)-min(score))/(count(uid)-2),1) as clip_avg_score from( select a.uid,b.exam_id,a.score,b.tag,b.difficulty from exam_record a left join examination_info b on a.exam_id = b.exam_id where b.tag = 'SQL' and b.difficulty = 'hard' and a.score is not null) c
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