Where is the base domain stored in database D7 Is there an equivalent row to the Wordpress "Home" and "Site"? In otherwords, where can I look in the database to figure out what the domain the site is on?
 I'm using mysql
I think you're looking for $base_url in /sites/default/settings.php.  As far as I know everything in the database works off this value, and it is not explicitly set in the DB