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(id) as user_num,//2.利用对应函数进行计算就行，下面以此类推 avg(active_days_within_30) as avg_active_day, avg(question_cnt) as avg_question_cnt from user_profile group by gender,university //1.进行正确的分组，可以先观察分组后的数据是否符合要求
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