稍微简洁一点
得分不小于平均分的最低分
https://www.nowcoder.com/practice/3de23f1204694e74b7deef08922805b2
select
min(score) min_score_over_avg
from
exam_record e
where
score >= (
select
avg(e1.score)
from
exam_record e1
inner join examination_info e2 on e1.exam_id = e2.exam_id
and e2.tag = 'SQL'
)
and exists(
select * from examination_info where tag='SQL' and exam_id=e.exam_id
)
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