题解 | #分组排序练习题#
分组排序练习题
https://www.nowcoder.com/practice/e00bbac732cb4b6bbc62a52b930cb15e
# 先对大学分组,分完组之后,查询平均发帖,查询之后,排序即可
# SQL执行顺序, from > group by > select > order by
select
university,
avg(question_cnt) as avg_question_cnt
from user_profile
group by university
order by avg_question_cnt asc