Edition-based redefinition (EBR) in Oracle Database 11g Release 2 is spectacular, introducing a new dimension to the database which allows us to version objects within a schema. Through EBR, we achieve zero-downtime application upgrade and multiple application versions simultaneously against one schema. No more big-bang upgrade! This session introduces EBR, demonstrates the SQL, and shows the multi-version application. It dives into some complexities of data synchronization between editions and discusses best practices with EBR.