题解 | #分组过滤练习题#
分组过滤练习题
http://www.nowcoder.com/practice/ddbcedcd9600403296038ee44a172f2d
SELECT university, ROUND(avg(question_cnt), 4) as avg_question_cnt,
ROUND(avg(answer_cnt), 4) as avg_answer_cnt
from user_profile
group by university
having avg_question_cnt < 5 or avg_answer_cnt < 20;
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