It is used to consolidate multiple catalog database repositories into a single catalog database
Once the import is successful, it unregisters the database from the destination catalog database i.e. the database where the metadata is imported
Once the import is successful, it unregisters the database from the source catalog database i.e. the database which holds the original metadata
If NO UNREGISTER clause is used, it will not unregister the database from the destination catalog database i.e. the database where the metadata is imported
If NO UNREGISTER clause is used, it will not unregister the database from the source catalog database i.e. the database which holds the original metadata