题解 | #分组过滤练习题#
分组过滤练习题
https://www.nowcoder.com/practice/ddbcedcd9600403296038ee44a172f2d
SELECT A.university,A.avg_question_cnt,A.avg_answer_cnt FROM (SELECT university ,AVG(question_cnt) AS avg_question_cnt,AVG(answer_cnt) AS avg_answer_cnt FROM user_profile GROUP BY university) A WHERE A.avg_question_cnt<5 OR A.avg_answer_cnt<20
