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) avg_question_cnt ,avg(answer_cnt) avg_answer_cnt from user_profile group by 1 having avg(question_cnt)<5 or avg(answer_cnt)<20
聚合后筛选用having
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