--查看Oracle数据库字符集：

　　Sql代码

　　select userenv('language') from dual;

　　查询结果：

　　SIMPLIFIED CHINESE_CHINA.AL32UTF8

　　--修改oracle数据库字符集：(在SQL Plus中)

　　Sql代码

　　sql> conn / as sysdba;

　　sql> shutdown immediate;

　　database closed.

　　database dismounted.

　　oracle instance shut down.

　　sql> startup mount;

　　oracle instance started.

　　total system global area 135337420 bytes

　　fixed size 452044 bytes

　　variable size 109051904 bytes

　　database buffers 25165824 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 internal_use AL32UTF8;

　　sql> shutdown immediate;

　　sql> startup;

　　修改oracle用户的NLS_LANG

　　编辑/home/oracle/.bash_profile

　　Bash代码

　　export NLS_LANG="SIMPLIFIED CHINESE_CHINA.AL32UTF8"