sqlplus "/ 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;
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原文地址:http://www.cnblogs.com/masw/p/3927175.html