ORA-12712: new character set must be a superset of old character set
Cause: 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.
Action: Specify a superset character set.
Cause: 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.
Action: Specify a superset character set.
