Hi, Below two links might be useful to your doubts: http://www.oracle.com/technology/tech/globalization/htdocs/nls_lang%20faq.htm http://www.wangz.net/nls_ei.php Thanks, Ann On Dec 19, 2007 2:41 PM, qihua wu <staywithpin@xxxxxxxxx> wrote: > Hi, all, > > When using the old import/export tools imp/exp, the NLS_LANG at the client > must be set and should be set correctly to make them work. But after I > search the doc about expdp/impdp, nowhere mentioned that NLS_LANG must be > set and how to set. And the log created when I run impdp/expdp also didn't > tell any information about charset and possible charset convertion. So I am > wondering whether NLS_LANG is nothing when using impdp/expdp > > Thanks, > Qihua >