订单回购率/复购率

1. 计算本月和下月消费用户数以及相应的回购率

select a.umonth,count(a.customer_key) AS now_count,

count(b.customer_key) as next_count,

concat(round(count(b.customer_key)/count(a.customer_key)*100,2),'%')AS ratio

from

(select customer_key,DATE_FORMAT(create_date,'YYYY-MM') AS umonth

from ods_sales_orders group by customer_key,DATE_FORMAT(create_date,'YYYY-MM'))a

LEFT JOIN

(select customer_key,DATE_FORMAT(create_date,'YYYY-MM') AS umonth

from ods_sales_orders GROUP BY customer_key,DATE_FORMAT(create_date,'YYYY-MM'))b

ON a.customer_key = b.customer_key AND

concat(a.umonth,'-01')=add_months(concat(b.umonth,'-01'),-1)

GROUP BY a.umonth;

2.

对于以下需求：用户表：users (user_id  int)

订单表：order_tb(user_id int, or_time  date, or_money double)

求以下用户：

一月下过单，二月份没有下过单的三月份下单用户

的如下指标：

三月份订单金额大于100的订单数，三月份第一笔订单和最后一笔订单的订单金额。（每个用户的哦

with us1 as  (select user_id,or_time,or_money,

sum(nvl(case when  to_char(or_time,'MM') = '01' then 1 end,0)) over (partition by user_id) m1,

sum(nvl(case when  to_char(or_time,'MM') = '02' then 1 end,0)) over (partition by user_id) m2,

sum(nvl(case when  to_char(or_time,'MM') = '03' then 1 end,0)) over (partition by user_id) m3,

sum(case when  to_char(or_time,'MM') = 03 and or_money > 100 then 1 end) over (partition by user_id) cnt

from order_tb

where or_time between to_date('20170101','YYYYMMDD') and to_date('20170331','YYYYMMDD')

),

mo1 as

(select distinct user_id,

  case when  to_char(or_time,'MM') = 03 then first_value(or_money) over (partition by user_id order by or_time) end f1v,

  case when  to_char(or_time,'MM') = 03 then last_value(or_money) over (partition by user_id order by or_time range between unbounded preceding and unbounded following) end f3l,

  cnt from (select * from us1 where m2=0 and m1 >0 and m3 >0 and or_time between to_date('20170301','YYYYMMDD') and to_date('20170331','YYYYMMDD'))

)