Oracle Active Data Guard has realtime query. Real time query means your physical standby database to be open read-only while Redo data is coming and apply active. For example You change PROD databaseselect salary from employees where employee_id=100;24000then you change update employees set salary=10000 where employee_id=100;commit;Up-to-date Meantime connect Physical databaseselect salary from employees where employee_id=100;10000;User … Continue reading Oracle Active Data Guard