We have already known that there're 4 states in life cycle of an instance. They are idle, nomount, mount and open. In this post, we… Read More »How to Tell What State of Database is Currently at
Database Identifier (DBID)
In previous post, we have talked about how to change DBID of a RAC database. In this post, we will talk about how to change… Read More »How to Change DB_NAME of a RAC Database
For a duplicate database, you may want to change its Database Identifier (DBID) only in order to distinguish this one from another. For a RAC… Read More »How to Change DBID of a Single-Instance Database
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?