pg_dump with select output

  Dear all,

I am using pg_dump in Postgresql database very often and read several
parameters of it.
But today i want to back up that part of table which satisfies satisfies
certain condition ( select command ).

In mysql , this is achieved as below :

mysqldump -h192.168.1.106 -uroot -porkash -q -w"internalurl_id between 1
and 30" bicrawler internalurl > /root/Desktop/internal_url.sql

-w option is used for executing select command .

But don't know how this is achieved through pg_dump command.

Please help.


Thanks & best Regards,

Adarsh Sharma