pg_restore

Hi all,

 I have two databases db1 and db2 with no network connection. I want to take backup of few master tables from db1 and restore it to db2 at frequent intervals.. I do not want to delete data from the tables and restores the fresh data as this data is getting referenced in other tables. I can do that by creating scripts on db1 and executing the same on db2. But I want to know if  I can use pg_restore command to overwrite existing data of these master tables

Thanks,

Jyoti