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)
FROM examination_info ei
JOIN exam_record er
ON ei.exam_id=er.exam_id
WHERE tag='SQL' AND difficulty='hard'
FROM examination_info ei
JOIN exam_record er
ON ei.exam_id=er.exam_id
WHERE tag='SQL' AND difficulty='hard'
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