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) as clip_avg_score from examination_info as ei join exam_record as er on ei.exam_id = er.exam_id where ei.tag = "SQL" and ei.difficulty = "hard";
