关于Environment variable的设置，无语了...
在做字符集测试的时候，想把系统环境变量NLS_LANG设为AMERICAN_AMERICA.US7ASCII，于是进行如下操作：
C:\Documents and Settings\p485224>set NLS_LANG=AMERICAN_AMERICA.US7ASCII;
可是用SQLPLUS死活连不进去了：
C:\Documents and Settings\p485224>SQLPLUS
SQL*Plus: Release 9.2.0.1.0 - Production on Mon Mar 24 16:49:01 2008
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Enter user-name: / AS SYSDBA
ERROR:
ORA-12705: invalid or unknown NLS parameter value specified
Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied
Enter user-name:
ERROR:
ORA-01017: invalid username/password; logon denied
SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus
最后从文档上copy了一下粘贴上去，竟然成功了：
C:\Documents and Settings\p485224>set NLS_LANG=AMERICAN_AMERICA.US7ASCII
C:\Documents and Settings\p485224>SQLPLUS
SQL*Plus: Release 9.2.0.1.0 - Production on Mon Mar 24 16:49:17 2008
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Enter user-name: / AS SYSDBA
Connected to:
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>
SQL>
仔细一看，其中的区别让我真的很郁闷......一开始我总在最后加了一个“;”，所以一直不行！！！哎，如此的一个小问题，搞了半天才搞定。不过清楚了以后就不会犯类似的错误了~~~
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转载于:http://blog.itpub.net/9765498/viewspace-217053/