How to fix the Oracle error ORA-12712: new character set must be a superset of old character set?

In this post, you’ll learn more about the Oracle ErrorORA-12712: new character set must be a superset of old character set with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12712: new character set must be a superset of old character set

Reason for the Error ORA-12712: new character set must be a superset of old character set

When you ALTER DATABASE … CHARACTER SET, the new character set must be a superset of the old character set. For example, WE8ISO8859P1 is not a superset of the WE8DEC.

How to fix the Error ORA-12712: new character set must be a superset of old character set ?

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

Specify a superset character set.