题解 | #分组计算练习题#
分组计算练习题
http://www.nowcoder.com/practice/009d8067d2df47fea429afe2e7b9de45
select gender, university, count(*)user_num, avg(active_days_within_30), avg(question_cnt)question_cnt from user_profile group by gender, university;
分组计算练习题
http://www.nowcoder.com/practice/009d8067d2df47fea429afe2e7b9de45
select gender, university, count(*)user_num, avg(active_days_within_30), avg(question_cnt)question_cnt from user_profile group by gender, university;
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