更改Oracle12 数据库字符编码集

Oracle Server端字符集查询

SQL> select userenv('language') from dual;

USERENV('LANGUAGE')

----------------------------------------------------

AMERICAN_AMERICA.ZHS16GBK

由此可以看出字符集为ZHS16GBK

Server端字符集修改

将数据库启动到RESTRICTED模式下做字符集更改：

$ sqlplus "/as sysdba"

SQL> conn /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;

SQL> exit;

我这是在oracle12里的改法，11g应该一样吧