题解 | #统计每个学校的答过题的用户的平均答题数#
统计每个学校的答过题的用户的平均答题数
https://www.nowcoder.com/practice/88aa923a9a674253b861a8fa56bac8e5
select
university,
count(question_practice_detail.question_id) / count(distinct user_profile.device_id) as 'avg_answer_cnt'
from
user_profile
inner join
question_practice_detail
on
user_profile.device_id = question_practice_detail.device_id
group by
university
你得有更强的学历和技术，才能有这种资本啊，现在基本都得1-3年的吧，你这就三个月实习了，而且写的这么模糊