NLS_CHARACTERSET  change
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Spool charfix.log
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;
COL VALUE NEW_VALUE CHARSET
–SELECT VALUE FROM NLS_DATABASE_PARAMETERS WHERE PARAMETER=’NLS_CHARACTERSET’;
SELECT ‘AL32UTF8′ as value FROM NLS_DATABASE_PARAMETERS WHERE PARAMETER=’NLS_CHARACTERSET’;
COL VALUE NEW_VALUE NCHARSET
SELECT VALUE FROM NLS_DATABASE_PARAMETERS WHERE PARAMETER=’NLS_NCHAR_CHARACTERSET’;
ALTER DATABASE CHARACTER SET INTERNAL_USE &CHARSET;
ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE &NCHARSET;
SHUTDOWN IMMEDIATE;
STARTUP;
— yes, 2 times startup/shutdown . This is not a typo
SHUTDOWN IMMEDIATE;
STARTUP;
spool off