题解 | #日活与每日次日留存率#
日活与每日次日留存率
https://www.nowcoder.com/practice/18b168ada98d4bdb9108444443cea7d3
select visit_date,
count(id) as dau,
count(q1) / count(id) as next_day_per
from (
select t1.id,t1.visit_date,t2.visit_date as q1
from user_visit_log as t1
left join user_visit_log as t2
on t1.id = t2.id and datediff(t2.visit_date,t1.visit_date) = 1
) as temp
group by visit_date;
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