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
#这些信息是固定的，直接写死
'SQL',
'hard',
ROUND(AVG(e.`score`),1) AS clip_avg_score
FROM
exam_record e
JOIN examination_info i ON e.exam_id = 9001
WHERE
#去掉最高分和最低分
e.score NOT IN (
SELECT
MAX(score)
FROM
exam_record
UNION
SELECT
MIN(score)
FROM
exam_record
);
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