I just want to learn how to integrate multiple databases into one, so that the user logs into 1 spot, and is logged into the other databases also, instead of having to create 3 different accounts to log into each section of the website. I do not know much at all, but give me the chance and ill keep up with whats being said. Im willing to pay for someone to teach me how if that is whats needed, or for someone to do it for me. Id rather learn how myself though to be honest, for the personal experience.
The code you write determines the database that's used, it has nothing to do with the user's login. Have you learned enough programming yet to connect a web page to a database?