I am Using below query :
select UserId, Category from customer_data
where (Category in ('Fashion','Electronics'))
and (Action in ('Click','AddToCart','Purchase'))
and customer_data.UserId not in (select ustomer_data.UserId from customer_data where customer_data.Category='Fashion' and customer_data.Category='Electronics') ;
Getting below error :
hive> Unsupported SubQuery Expression ''Fashion'': SubQuery expression refers to Outer query expressions only.
I am not sure about this error , do I need to use table name for each cloumn like customer_data.Category in outer query also ? Could you please help ?
Sample data :
UserId,ProductId,Category,Action
1,111,Electronics,Browse
2,112,Fashion,Click
3,113,Kids,AddtoCart
4,114,Food,Purchase
5,115,Books,Logout
6,114,Food,Click
7,113,Kids,AddtoCart
8,115,Books,Purchase
9,111,Electronics,Click
10,112,Fashion,Purchase
3,112,Fashion,Click
12,113,Kids,AddtoCart
desired output :
Output File
• userID
• category
Use analytic functions to calculate fashion_flag per UserId:
select UserId, Category
from
( --calculate User level flags
select UserId, Category,
max(fashion_flag) over (partition by UserId) as user_fashion_flag,
max(electronics_flag) over (partition by UserId) as user_electronics_flag
from
(--maybe you do not need this subquery, if case will work inside max() over
select UserId, Category,
case when Category='Fashion' then 1 else 0 end fashion_flag,
case when Category='Electronics' then 1 else 0 end electronics_flag
from customer_data
where (Category in ('Fashion','Electronics'))
and (Action in ('Click','AddToCart','Purchase'))
) s
) s
where user_fashion_flag+user_electronics_flag=1 --not allow two flags at a time
;