進入sqlplus之後， 按照下面給出的命令依次執行就可以了, SQL>conn  / as sysdba SQL>SHUTDOWN IMMEDIATE SQL>conn  / as sysdba 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 ZHS16GBK ; ALTER DATABASE CHARACTER SET ZHS16GBK *ERROR at line 1: ORA-12712: new character set must be a superset of old character set 報字符集不相容，此時下INTERNAL_USE指令不對字符集超集進行檢查： SQL>ALTER DATABASE CHARACTER SET INTERNAL_USE ZHS16GBK; SQL>SHUTDOWN IMMEDIATE SQL>STARTUP