change oracle database character set

 

shutdown immediate;
startup mount;
alter system enable restricted session;
alter system set job_queue_processes=0;
alter system set aq_tm_processes=0;
alter database open;
alter database character set zhs16gbk;
# ORA-12712: new new Character the SET the MUST BE A superset of the SET Old Character 
# prompt our character sets: the new character set must be a superset of old character set, then we can skip the check superset make changes: 
# the ALTER database character set internal_use zhs16gbk;

#alter database national character set internal zhs16gbk;
shutdown immediate;
startup;