Each new database instance is created with a unique value (UUID) to clearly identify the database source of any audit table records. When a database is being moved or copied, the security administrator responsible can assign a new, unique identity to the new instance of the database. The generation of a new database identity preserves the point-of-access integrity in the audit data records. When each database instance has a unique identity, you can use the audit data to trace access to a particular instance and user.

Note that a read-only database copy can retain the original instances value, since it does not qualify as a unique database instance.