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(score)-2),1) clip_avg_score from( select tag,difficulty,score from examination_info i inner join exam_record r on i.exam_id = r.exam_id and tag = 'SQL' and difficulty = 'hard' and score is not null order by score ) as sub;
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