How to update table in Hive 0.13?

Question

My Hive version is 0.13. I have two tables, table_1 and table_2

table_1 contains:

customer_id | items | price          


        

Answer 1

You can use row_number or full join. This is example using row_number:

insert overwrite table_1 
select customer_id, items, price, updated_date
from
(
select customer_id, items, price, updated_date,
       row_number() over(partition by customer_id order by new_flag desc) rn
from 
    (
     select customer_id, items, price, updated_date, 0 as new_flag
       from table_1
     union all
     select customer_id, items, price, updated_date, 1 as new_flag
       from table_2
    ) all_data
)s where rn=1;

Also see this answer for update using FULL JOIN: https://stackoverflow.com/a/37744071/2700344