For a duplicate database, you may want to change its Database Identifier (DBID) only in order to distinguish this one from another. Here we use… Read More »How to Change DBID of a Single-Instance Database
Database Identifier (DBID)
NID-00120 I was trying to change database name (DB_NAME) of a 19c RAC database by DBNEWID utility (nid), but it failed with NID-00120: Database should… Read More »How to Resolve NID-00120: Database should be mounted exclusively
Normally and generally, recovery catalog recognizes the databases by DBID which is a unique number among different databases. But there's a problem: the primary database… Read More »How does Recovery Catalog Recognize Databases Which is Which?