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错误现象:[Oracle@www.linuxidc.com data]$ exp "sys/oracle@www.linuxidc.com as sysdba" file=/data/sys.dmp log=/data/sys.log full=y;
LRM-00108: invalid positional parameter value "as"EXP-00019: failed to process parameters, type "EXP HELP=Y" for help
EXP-00000: Export terminated unsuccessfully原因:
   这个可能是Oracle10g的一个BUG,只需按照如下两种方法即可:
解决办法:    第一种方法:
[oracle@www.linuxidc.com data]$ exp "sys/oracle as sysdba" file=/data/sys.dmp log=/data/sys.log full=y;Export: Release 10.2.0.1.0 - Production on Wed May 2 19:20:12 2012Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses WE8ISO8859P1 character set (possible charset conversion)About to export the entire database ...
. exporting tablespace definitions
. exporting profiles
. exporting user definitions
. exporting roles
. exporting resource costs    第二种方法:
[oracle@www.linuxidc.com ~]$ exp "sys/oracle as sysdba" file=/data/sys1.dmp log=/data/sys1.log full=y;Export: Release 10.2.0.1.0 - Production on Wed May 2 19:26:08 2012Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses WE8ISO8859P1 character set (possible charset conversion)About to export the entire database ...
. exporting tablespace definitions^[
. exporting profiles
. exporting user definitions更多Oracle相关信息见Oracle 专题页面 http://www.linuxidc.com/topicnews.aspx?tid=12MySQL 递归排序查询+树节点生成在Ubuntu上安装MongoDB相关资讯      Oracle数据库基础教程 
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