修改oracle的字符集操作方法

cmd环境下进行以下命令行的操作
--连接
sqlplus / as sysdba
--命令行
shutdown immediate;
startup mount
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 ZHS16GBK;
shutdown immediate;
startup