Oracle11g 修改数据库编码（UTF-8修改为GBK）

1、查询数据库编码

//  方法一：
SQL> SELECT value$ FROM sys.props$ WHERE name = 'NLS_CHARACTERSET' ;
// 方法二：
SQL> select userenv('language') from dual;

2、打开cmd命令窗口，输入“sqlplus /nolog”，进入“SQL>”的输入符下状态

SQL> connect username/password 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;
// 跳过超子集检测
SQL> ALTER DATABASE CHARACTER SET INTERNAL_USE ZHS16GBK; 
SHUTDOWN IMMEDIATE;
STARTUP;