How to fix the Oracle error NID-00120: Database should be mounted exclusively?

In this post, you’ll learn more about the Oracle ErrorNID-00120: Database should be mounted exclusively with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NID-00120: Database should be mounted exclusively

Reason for the Error NID-00120: Database should be mounted exclusively

The database was started in parallel mode. To change the DBID, the database must be mounted exclusively.

How to fix the Error NID-00120: Database should be mounted exclusively ?

You can fix this error in Oracle by following the below steps

Shut down the database and start it in exclusive mode.