a,2017-10-11,300
a,2017-10-12,200
a,2017-10-13,100
a,2017-10-15,100
a,2017-10-16,300
a,2017-10-17,150
a,2017-10-18,340
a,2017-10-19,360
b,2017-10-11,400
b,2017-10-12,200
b,2017-10-15,600
c,2017-10-11,350
c,2017-10-13,250
c,2017-10-14,300
c,2017-10-15,400
c,2017-10-16,200
d,2017-10-13,500
e,2017-10-14,600
e,2017-10-15,500
d,2017-10-14,600
分析 : 給每個使用者乙個編號,用日期減去編號,如果是同一天,那麼就是連續的.
a,2017-10-11,300,1,2017-10-10
a,2017-10-12,200,2,2017-10-10
a,2017-10-13,100,3,2017-10-10
a,2017-10-15,100,4,2017-10-11
a,2017-10-16,300,5,2017-10-11
a,2017-10-17,150,6,2017-10-11
a,2017-10-18,340,7,2017-10-11
a,2017-10-19,360,8,2017-10-11
b,2017-10-11,400
b,2017-10-12,200
b,2017-10-15,600
c,2017-10-11,350
c,2017-10-13,250
c,2017-10-14,300
c,2017-10-15,400
c,2017-10-16,200
d,2017-10-13,500
e,2017-10-14,600
e,2017-10-15,500
d,2017-10-14,600
1:建表，載入資料
create table t_jd(shopid string,dt string,sale int)
row format delimited fields terminated by ',';
load data local inpath '/root/sale.dat' into table t_jd;
2:打編號
select shopid,dt,sale,
row_number() over(partition by shopid order by dt) as rn
from t_jd;
結果 :
3 根據編號，生成連續日期
select shopid,dt,sale,rn,
date_sub(to_date(dt),rn)
from
(select shopid,dt,sale,
row_number() over(partition by shopid order by dt) as rn
from t_jd) tmp;
結果 :
4 分組，求count
select shopid,count(1) as cnt
from
(select shopid,dt,sale,rn,
date_sub(to_date(dt),rn) as flag
from
(select shopid,dt,sale,
row_number() over(partition by shopid order by dt) as rn
from t_jd) tmp) tmp2
group by shopid,flag;
結果 :
5 篩選出連續天數大於等於3的
select shopid from
(select shopid,count(1) as cnt
from
(select shopid,dt,sale,rn,
date_sub(to_date(dt),rn) as flag
from
(select shopid,dt,sale,
row_number() over(partition by shopid order by dt) as rn
from t_jd) tmp) tmp2
group by shopid,flag) t***
where t***.cnt>=3;
結果 :
6 去重
select distinct shopid from
(select shopid,count(1) as cnt
from
(select shopid,dt,sale,rn,
date_sub(to_date(dt),rn) as flag
from
(select shopid,dt,sale,
row_number() over(partition by shopid order by dt) as rn
from t_jd) tmp) tmp2
group by shopid,flag) t***
where t***.cnt>=3;
結果 :
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