Table relationship for subtypes

Question

I have a parent table called \'Website\' which holds records about websites. I have a child table called \'SupportSystem\' which holds records about different types of suppo

Answer 1

I would add a new column 'SupportPlatformId" to the "SupportSystem" table which lookup to the table "SupportPlatform", because "SupportSystem" to "SupportPlatform" is probably one-to-one or many-to-one.

Hence: Website -> (via Website_SupportSystem) SupportSystem -> SupportPlatform