ORACLE Streams are based on advance queues. The Streams PROVIDE a mechanism to synchronize data between two servers. Streams ENSURE reliable data synchronization between the servers based on the defined rules.
Both Oracle CDC and Streams are generally used for data synchronization between Oracle database servers. With Oracle CDC, you could write your own data export routines, which create FLAT files for the purpose of synchronization between two database servers; whereas, with Streams you must have a network link between the two servers.

Oracle Streams are based on advance queues. The Streams provide a mechanism to synchronize data between two servers. Streams ensure reliable data synchronization between the servers based on the defined rules.
Both Oracle CDC and Streams are generally used for data synchronization between Oracle database servers. With Oracle CDC, you could write your own data export routines, which create flat files for the purpose of synchronization between two database servers; whereas, with Streams you must have a network link between the two servers.