Question

I have two tables

USER and TRANSACTION

i want to choose the data from TRANSACTION table for last one year if the USER has made any transaction in the last month

USER and TRANSACTION table are connected using USER_ID

how can it will be achieved?

Answer 1

select 
  trx_detail_1,
  trx_detail_2
from ( 
  select sum(
           case when trx_date > add_months(sysdate, -1) then 1 else 0 end
         ) over (partition by user_id) sum_user_last_month,
         trx_detail_1,
         trx_detail_2
     from 
         transaction
     where
         trx_date > add_months(sysdate, -12)
)
where 
     sum_user_last_month > 0;