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复制SQL> conn /as sysdba Connected. SQL> shutdown immediate; Database closed. Database dismounted. ORACLE instance shut down. SQL> startup mount ORACLE instance started. Total System Global Area 236000356 bytes Fixed Size 451684 bytes Variable Size 201326592 bytes Database Buffers 33554432 bytes Redo Buffers 667648 bytes Database mounted. SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION; System altered. SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0; System altered. SQL> ALTER SYSTEM SET AQ_TM_PROCESSES=0; System altered. SQL> alter database open; Database altered. 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 1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.
