How to fix the Oracle error ORA-12318: database (link name string) is already mounted?

In this post, you’ll learn more about the Oracle ErrorORA-12318: database (link name string) is already mounted with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12318: database (link name string) is already mounted

Reason for the Error ORA-12318: database (link name string) is already mounted

You are attempting to mount a secondary database that has already been mounted by your instance.

How to fix the Error ORA-12318: database (link name string) is already mounted ?

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

to mount it. To establish access, use the ALTER DATABASE OPEN command to open the database.