已知使用者表t_user, uid int 使用者id

訂單表：t_order
oid int 訂單id
uid int 使用者id
otime date 訂單時間
Amount double 訂單金額
其中使用者表和訂單表是一對多的關係

需求：

結果集要求：
計算在2018年1月下過訂單，2月份沒有下過訂單的使用者在3月份的訂單金額分佈。
具體欄位如下：
uid，三月份訂單金額超過10的訂單數，3月份首次下單的金額，3月份最後一次下單的金額

測試資料如下：

create table t_order 
(oid int , 
 uid int ,
 otime date,
 oamount int 
)partitioned 
 
by (dt string) ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t';

insert into table t_order  partition(dt ='2018-01-01') values(1003,2,'2018-01-01',100);
insert into table t_order  partition(dt ='2018-01-02') values(1004,2,'2018-01-02',20);
insert into table t_order  partition(dt ='2018-01-02') values(1005,2,'2018-01-02',100);
insert
 
 into table t_order  partition(dt ='2018-01-02') values(1006,4,'2018-01-02',30);
insert into table t_order  partition(dt ='2018-01-03') values(1007,1,'2018-01-03',130);
insert into table t_order  partition(dt ='2018-01-03') values(1008,2,'2018-01-03',5);
insert into table t_order  partition(dt ='2018-01-03') values(1009,2,'2018-01-03
 
',5);
         
insert into table t_order  partition(dt ='2018-02-01') values(1001,5,'2018-02-01',110);
insert into table t_order  partition(dt ='2018-02-01') values(1002,3,'2018-02-01',110);
insert into table t_order  partition(dt ='2018-02-03') values(1003,3,'2018-02-03',100);
insert into table t_order  partition(dt ='2018-02-03') values(1004,3,'2018-02-03',20);
insert into table t_order  partition(dt ='2018-02-04') values(1005,3,'2018-02-04',30);
insert into table t_order  partition(dt ='2018-02-04') values(1006,6,'2018-02-04',100);
insert into table t_order  partition(dt ='2018-02-04') values(1007,6,'2018-02-04',130);
 
insert into table t_order  partition(dt ='2018-03-01') values(1001,1,'2018-03-01',120);
insert into table t_order  partition(dt ='2018-03-03') values(1002,2,'2018-03-03',5);
insert into table t_order  partition(dt ='2018-03-03') values(1003,2,'2018-03-03',11);
insert into table t_order  partition(dt ='2018-03-03') values(1004,3,'2018-03-03',1);
insert into table t_order  partition(dt ='2018-03-04') values(1005,3,'2018-03-04',20);
insert into table t_order  partition(dt ='2018-03-04') values(1006,4,'2018-03-04',30);
insert into table t_order  partition(dt ='2018-03-04') values(1007,1,'2018-03-04',50);

實現：

select 
uid,
sum(if(date_format(otime,'yyyy-MM')='2018-01',1,0)) as month1_order_cnt,
sum(if(date_format(otime,'yyyy-MM')='2018-02',1,0)) as month2_order_cnt,
sum(if(date_format(otime,'yyyy-MM')='2018-03' and oamount>10,oamount,0)) as month3_order_amount,
sum(if(date_format(otime,'yyyy-MM')='2018-03' and rk=1,oamount,0)) as month3_first,
sum(if(date_format(otime,'yyyy-MM')='2018-03' and rk=cnt,oamount,0)) as month3_last
from(
select 
count(*) over(partition by uid,date_format(otime,'yyyy-MM')) as cnt,
row_number() over(partition by uid,date_format(otime,'yyyy-MM')) as rk,
*
from t_order 
)  as t
group by uid 
having month1_order_cnt>0 and month2_order_cnt=0