题解 | #得分不小于平均分的最低分#

select min(score)as min_score_over_avg
from exam_record r left join examination_info i on r.exam_id=i.exam_id
where i.tag="SQL"
and score>=(select avg(r.score)as min_score_over_avg
from exam_record r left join examination_info i on r.exam_id=i.exam_id
where i.tag="SQL")