Pl help in query

Question

I have a table arm. In that loan_number,change_begin_date and change_end_date are composite primary key.so i want only one data for loan_number as per this condition change_begin_date <= trunc(sysdate, 'mm')-1 and
change_end_date >= trunc(sysdate, 'mm') - 1
So how to write query?

Answer 1

select *
from arm
where trunc(sysdate,'mm') - 1 between change_begin_date and change_end_date;
if you mean, you want only one record then you should have another conditions. the above query might return more than one records...
or probably you mean something like this...
select * from arm
where (loan_number, change_begin_date, change_end_date) in
(select loan_number, change_begin_date, change_end_date
from arm
where trunc(sysdate,'mm') - 1 between change_begin_date and change_end_date
and rownum = 1);