题解 | #得分不小于平均分的最低分#
得分不小于平均分的最低分
https://www.nowcoder.com/practice/3de23f1204694e74b7deef08922805b2
select min(IF(er.score >= (select avg(er.score) as avg from exam_record er left join examination_info ei on er.exam_id = ei.exam_id where ei.tag = 'SQL' and er.score is not null group by ei.tag), er.score, 1000)) as min_score_over_avg from exam_record er left join examination_info ei on er.exam_id = ei.exam_id where ei.tag = 'SQL' and er.score is not null;