[drupal-support] moving a site?

[D_C]

hi all -

I want to get a Drupal site all up and running in the background, and 
then switch it to live.

If i configure the site on one URL, and then move it to a new URL, is 
the only change needed in the

sites/default/settings.php

-> $base_url =

or are URL entries somehow written into the DB?
the DB connection URL will remain the same.

Is there another way to do this? eg can i setup the site in a subdirectory?

tx!

/dc