题解 | #平均活跃天数和月活人数#
平均活跃天数和月活人数
http://www.nowcoder.com/practice/9e2fb674b58b4f60ac765b7a37dde1b9
SELECT DATE_FORMAT(submit_time,'%Y%m') month,
ROUND(COUNT(DISTINCT uid,DATE_FORMAT(submit_time,'%Y%m%d'))/COUNT(DISTINCT uid),2) avg_active_days,
COUNT(DISTINCT uid) mau
FROM exam_record
WHERE YEAR(submit_time)=2021
GROUP BY DATE_FORMAT(submit_time,'%Y%m')
ROUND(COUNT(DISTINCT uid,DATE_FORMAT(submit_time,'%Y%m%d'))/COUNT(DISTINCT uid),2) avg_active_days,
COUNT(DISTINCT uid) mau
FROM exam_record
WHERE YEAR(submit_time)=2021
GROUP BY DATE_FORMAT(submit_time,'%Y%m')
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