题解 | 统计商家不同会员每日访问人次及访问人数

with t as (select user_id, count(visit_time) as visit_nums
from visit_tb
group by user_id), 

t2 as (select t.user_id, t.visit_nums, u.vip from t left join 
uservip_tb u on t.user_id = u.user_id)

select vip, sum(visit_nums) as visit_nums, count(distinct user_id) as visit_users
from t2 group by vip order by visit_nums desc