I am designing the database for a portal.Specifically, I have a users table that contains columns: id, username and password.
Also there are three types of users: buyers, sellers and brokers and each user has a separate table with columns: name, description, mobile,introducer etc.The broker table doesn't have introducer column.
Based on this design I want to create a two step registration form with first step login info and the second step profile info.
Now, the business rules dictate that a user can be a buyer, seller or broker.A user can have at most one profile(buyer, seller or broker). I want to keep the login details and the profile info separate in the database
What I have done:
I have created a separate table for users, brokers, buyers and sellers with user id as foreign key in the buyers , brokers and sellers table.
Now my question is
- How to create the tables for this design?
- How to specify the foreign key constraints?
I am new to database designing and all help is appreciated.Thanks in advance.
