题解 | #分组过滤练习题#
分组过滤练习题
http://www.nowcoder.com/practice/ddbcedcd9600403296038ee44a172f2d
SELECT university, AVG(question_cnt) AS avg_question_cnt, avg(answer_cnt) as avg_answer_cnt FROM user_profile group by university having (avg(question_cnt) <5) or (avg(answer_cnt) <20)