更改oracle字符集

转自: http://www.cnblogs.com/HondaHsu/archive/2011/08/02/2125130.html
sqlplus /nolog

conn /as sysdba

shutdown immediate;

startup mount;

ALTER SESSION SET SQL_TRACE=TRUE;

ALTER SYSTEM ENABLE RESTRICTED SESSION;

ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;

ALTER SYSTEM SET AQ_TM_PROCESSES=0;

ALTER DATABASE OPEN;

set linesize 120;

alter database character set zhs16gbk;

RROR at line 1:

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

ALTER DATABASE character set INTERNAL_USE zhs16gbk;

ALTER SESSION SET SQL_TRACE=FALSE;

shutdown immediate;

STARTUP

select NLS_CHARACTERSET from nls_database_parameters;