题解 | #分组过滤练习题#
分组过滤练习题
http://www.nowcoder.com/practice/ddbcedcd9600403296038ee44a172f2d
select university,round(avg(question_cnt),3) as avg_question_cnt,round(avg(answer_cnt),3) as avg_answer_cnt from user_profile group by university having avg(question_cnt) < 5 OR avg(answer_cnt) < 20;
