on 7 August 2012
This is an excellent book which actually shows how you can use Oracle Golden Gate in actual Zero Downtime database upgrade.The same strategy can also be used very easily during a cross platform database migration. Sequences replication and their validation is explained very vividly. In bi-directional replication the concept of conflict detection and resolution is explained with real life examples, which makes it very easy to understand and implement.
These very advanced and complex topics could not be explained in a much simpler way than this.