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



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

Answer / guest

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.

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