sqlplus "/as sysdba"
sql> conn /as sysdba;
sql> shutdown immediate;
sql> startup mount;
sql> ALTER SYSTEM ENABLE RESTRICTED SESSION;
sql> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
sql> ALTER SYSTEM SET AQ_TM_PROCESSES=0;
sql> alter database open;
sql> alter database character set INTERNAL_USE UTF8;
sql> shutdown immediate;
sql> startup;
sql> exit;