search for: additional_attribute_value

I''m new to RoR and have used PHP. I want to develop a personal organizer that allows me to add lists (tables) and search them. The ActiveRecord concept seems to allow me to set up something that works with an existing table, but I want the ability to add tables without programming. I know how to do this in PHP and I can put the SQL into queries in RoR, but does ActiveRecord let