题解 | #分组过滤练习题#

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