题解 | #统计每个学校的答过题的用户的平均答题数#
统计每个学校的答过题的用户的平均答题数
https://www.nowcoder.com/practice/88aa923a9a674253b861a8fa56bac8e5
SELECT university, ROUND( count(*)/ count( DISTINCT u.device_id ), 4 ) AS avg_answer_cnt FROM user_profile u INNER JOIN question_practice_detail q ON u.device_id = q.device_id GROUP BY university ORDER BY university ASC
投递阿里云等公司7个岗位
