imp userid = system/system @orcl
fromuser = ... touser = ... file = ...
exp userid = system/system @orcl
owner = ...
file = ...建立用户时的权限赋予：
角色：connect resource
系统：create any table
unlimited tablespaceimp userid = system/system @orcl
fromuser = ... touser = ... file = ...
exp userid = system/system @orcl
owner = ...
file = ...建立用户时的权限赋予：
角色：connect resource
系统：create any table
unlimited tablespace