1. 查询当前字符集:
select userenv('language') from dual;
USERENV('LANGUAGE')
----------------------------------------------------
AMERICAN_AMERICA.ZHS16GBK
发现是 AMERICAN_AMERICA. 现在把它改成
2. 修改Oracle用户环境变量
vim ~/.bash_profile
export NLS_LANG="SIMPLIFIED CHINESE_CHINA".ZHS16GBK
:wq
source ~/.bash_profile
3. 再查询字符集