| createtime | userid | serialid | citycode |
| 2021/12/01 06:32:10 | ohmdTt3o2K9fcF | 211007190919 | 411502 |
| 2021/12/03 14:12:43 | 4wbOZCy4ZnqUj | 211007190201 | 341832 |
| 2021/12/05 20:50:21 | 8sdwQda3POdza | 211007192105 | 642213 |
| citycode | cityname |
| 411502 | 上海 |
| 341832 | 深圳 |
select y.firstdate, AVG(x.orders) orders_meanfrom(select userid, count(0) ordersfrom order aleft join city b on a.citycode = b.citycodewhere date(createtime) >= '2021-11-03'and date(createtime) < '2021-11-10'and b.cityname = '上海市'group by userid) xleft join(select userid, min(date(createtime)) firstdatefrom ordergroup by userid) y on x.userid = b.useridwhere date(y.firstdate) = '2021-11-03'group by y.firstdate;
select firstdate,sum(ord) orders,count(distinct userid) users,sum(orders)/count(distinct userid) orders_meanfrom(select b.firstdate,a.userid,count(case when a.createdate >= b.firstdate and a.createdate < date_add(b.firstdate, 7) then a.serial else null end) ordfrom(select date(createtime) createdate, userid, serialfrom order aleft join city b on a.citycode = b.citycodewhere b.cityname = '上海市')aleft join(select userid, min(date(createtime)) firstdatefrom ordergroup by userid)b on a.userid = b.useridwhere firstdate >= '2021-11-03'group by firstdate, a.userid) xgroup by firstdate
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