Multiple yet mutually exclusive foreign keys - is this the way to go?

Question

I have three tables: Users, Companies and Websites. Users and companies have websites, and thus each user record has a foreign key into the Websites table. Also, each compa

Answer 1

you don’t need a parent column, you can lookup the parents with a simple select (or join the tables) on the users and companies table. if you want to know if this is a user or a company website i suggest using a boolean column in your websites table.