题解 | 分组排序练习题
分组排序练习题
https://www.nowcoder.com/practice/e00bbac732cb4b6bbc62a52b930cb15e
select
university,
round(avg(question_cnt),4) as avg_question_cnt
from
user_profile
group by
university
order by
avg_question_cnt asc;
排序要用order by, asc升序， desc降序。 group by前面不要用where.