修改Oracle字符集

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;
alter database character set INTERNAL_USE UTF8;
update props$ set VALUE$='UTF8' where NAME='NLS_CHARACTERSET';
SHUTDOWN IMMEDIATE;
STARTUP;