usually we need to export the database tables to backup and others use. So we must know what to do export those data .
just exmple when I export the oracle all database tables with dmp files.
the method is following :
#exp oracle_userName/"""oracle_userPassword"""@orcl file=/SpecifiedPath/Name.dmp full=y
Note :why to do use the """oracle_userPassword"""" .if your password contains special characters ,then you can use this method .
orcl:spcified your database name .by default ,the database is orcl.
file=/SpecifiedPath/CustomName.dmp .Must use the name sufffix ".dmp".
by default ,the dmp files maybe have 20G of the size .
I have tried to export the dmp files ,if you have any dobut , you can contact me .learn form each other .
do export method of oracle all database tables with dmp files.
原文：http://www.cnblogs.com/rick52o/p/4819904.html