oracle修改字符集 (

Oracle 10g,修改可以采用下面的方法
  sql>connect system 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 ZHS16GBK ;

  sql>shutdown immediate ;
  sql>startup ;