How to fix the Oracle error NID-00121: Database should not be open?

AbundantCode 1 week ago in Oracle 0

In this post, you’ll learn more about the Oracle ErrorNID-00121: Database should not be open with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

NID-00121: Database should not be open

Reason for the Error NID-00121: Database should not be open

The database was open. To change the DBID, the database must be mounted exclusively.

How to fix the Error NID-00121: Database should not be open ?

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

Shutdown the database and mount it in exclusive mode.

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