方法1：
[oracle@primary ebank]$ exp "'/ as sysdba'" tables=emp file=emp.dmp log=emp.log
Export: Release 10.2.0.4.0 - Production on Fri Jul 30 09:35:10 2010
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
About to export specified tables via Conventional Path ...
. . exporting table EMP 20000 rows exported
Export terminated successfully without warnings.
方法2：
[oracle@primary ebank]$ exp \'/ as sysdba\' tables=emp file=emp.dmp log=emp.log
Export: Release 10.2.0.4.0 - Production on Fri Jul 30 09:36:32 2010
Copyright (c) 1982, 2007, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
About to export specified tables via Conventional Path ...
. . exporting table EMP 20000 rows exported
Export terminated successfully without warnings.
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