Designing a conditional database relationship in SQL Server

Question

I have three basic types of entities: People, Businesses, and Assets. Each Asset can be owned by one and only one Person or Business. Each Person and Business can own from

Answer 1

YOu can enforce the logic with a trigger instead. Then no matter how the record is changed, only one of the fileds will be filled in.

You could also have a PeopleAsset table and a BusinessAsset table, but stillwould have the problem of enforcing that only one of them has a record.