Localhost to server

Hi

I have what may seem like a silly question, but I am new to WP and databases. I installed WP fine and have it working fine using localhost. My question is this: I am creating links and doing all the design locally, but when I want to put it online, what exactly do I have to do? Can I simply upload the files or do I have to re-create the database tables and re-create all the posts?

Thanks

Rob