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.tag = "SQL" AND b.difficulty = "hard" and a.score < (select max(score) from exam_record where exam_id = 9001) and a.score > (select min(score) from exam_record where exam_id = 9001)
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