how to copy data from one database to another database in postgresql?

I am trying to开发者_如何转开发 copy tables from one postgresql8.4 to another postgresql8.4 and I am not sure how do I do that?

Can't you just take pg_dump from one and import in another? Seems quite trivial.
Take a look at this: http://www.postgresql.org/docs/8.4/static/backup-dump.html

You should be able to so it using a database link:

http://www.postgresql.org/docs/8.4/static/contrib-dblink.html

if you have postgres contrib installed you need to type this once is psql:

CREATE EXTENSION dblink;