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

Question

I want to change character set of oracle database from \'WE8MSWIN1252\' to \'AL32UTF8\'

I tried to execute following steps from the link (http://download.oracle.com/

Answer 1

replace line 6 by

ALTER DATABASE CHARACTER SET INTERNAL_USE AL32UTF8;

this solved my problem.