I heard that oracle does not support data communication between 9i and 12c using db link. are there any methods so that I can access 9i from 12c?
I want to generate a report on customer information. However, some customer information are stored in 9i and some are stored in 12c. If I want to combine data from both databases, is the following suggestion technical feasible?
declare 2 jdbc drivers, one for 9i and another for 12c in a java program. Then, I generate the report by combining the result sets from both drivers.