题解 | #分组过滤练习题#
分组过滤练习题
https://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