hi all ,
i have a select statement :
(select sum(t.CR_AMOUNT-t.DR_AMOUNT)
from HOSPITAL_TRANSACTIONS_VIEW t
where t.TRX_TYPE in ( 'CR','DR')
and t.CUSTOMER_NO = :account_no -- where (:account_no) is a char column in a non-database block
and t.trx_date between '01-03-2014' and '31-03-2014') ;
and i want to create a formula column based on it , but i do not know how ?
thanks in advance