题解 | #分组过滤练习题#
分组过滤练习题
https://www.nowcoder.com/practice/ddbcedcd9600403296038ee44a172f2d
SELECT *
FROM
(
SELECT
university,
AVG(question_cnt) avg_question_cnt,
AVG(answer_cnt) avg_answer_cnt
FROM user_profile
GROUP BY university
) t
WHERE avg_question_cnt < '5'
OR avg_answer_cnt < '20'
;
