题解 | 分组计算练习题
分组计算练习题
https://www.nowcoder.com/practice/009d8067d2df47fea429afe2e7b9de45
select gender,university,count(device_id)as user_num,
avg(active_days_within_30) as avg_active_day,
avg(question_cnt) as avg_question_cnt
from user_profile
group by gender,university
order by gender,university
在讨论区看到许多同学说跟题解一样为什么报错，可以参考一下这个答案，添加一行order by排序即可
，养生