Oracle修改默认字符编码

查看Oracle数据库字符集：
SQL> select userenv('language') from dual;
USERENV('LANGUAGE')
--------------------------------------------------------------------------------
AMERICAN_AMERICA.WE8MSWIN1252

SQL> shutdown immediate;
SQL> startup mount;
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;

SQL> select userenv('language') from dual;
USERENV('LANGUAGE')
----------------------------------------------------
AMERICAN_AMERICA.AL32UTF8
export NLS_LANG="SIMPLIFIED CHINESE_CHINA.AL32UTF8" 加入oracle用户变量即可