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_days,
avg(question_cnt) as avg_quesion_cnt
from user_profile
group by gender, university;
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