# 处理订单表,订单表有相同用户下了两单的情况,根据题目要求,我们只需要统计当日下单用户数量,所以要去重处理 with t2 as( select otime ,count(*) as num1 from( select distinct user_id ,date(order_time) as otime from order_tb) as t1 group by otime), # 处理登录表,同样有相同用户当日多次登录情况,我们只需要统计当日登录用户数,所以要去重处理 t4 as( select vtime ,count(*) as num2 from( select distinct ...