修改Oracle客戶端字符集方法:

1:可以通過修改登錄檔鍵值永久設定，類似於這樣的鍵值:
HKEY_LOCAL_MACHINE/SOFTWARE/Oracle/HOME0下,
如一般的簡體中文
nls_lang＝SIMPLIFIED CHINESE_CHINA.ZHS16GBK

2:檢視資料庫當前字符集引數設定

SQL> select userenv('language') from dual;

USERENV('LANGUAGE')
----------------------------------------------------
SIMPLIFIED CHINESE_CHINA.ZHS16GBK

3:開啟CMD視窗,亂碼情況

C:/Documents and Settings/Administrator>set NLS_LANG=american_america.AL32UTF8

C:/Documents and Settings/Administrator>sqlplus

SQL*Plus: Release 9.2.0.1.0 - Production on 星期六 4月 10 10:59:53 2010

Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.

請輸入使用者名稱:  scott
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連線到:
Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production

SQL> select empno,ename,sal from emp where empno=7779;

     EMPNO ENAME                                 SAL
---------- ------------------------------ ----------
      7779 鏉ㄥ鉤                                 6080

4:開啟另外個CMD視窗,正常情況

C:/Documents and Settings/Administrator>set NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK

C:/Documents and Settings/Administrator>sqlplus

SQL> select empno,ename,sal from emp where empno=7779;

     EMPNO ENAME             SAL
---------- ---------- ----------
      7779 楊平             6080