SQL Server foreign key to multiple tables

Question

I have the following database schema:

members_company1(id, name, ...);
members_company2(id, name, ...);
profiles(memberid, membertypeid, ...);
membertypes(id         


        

Answer 1

Come on you can create a table but you cannot modify members_company1 nor members_company2?

Your idea of a create a members table will require more actions when new records are inserted into members_company tables.
So you can create triggers on members_company1 and members_company2 - that is not modify?

What are the constraints to what you can do?

If you just need compatibility on selects to members_company1 and members_company2 then create a real members table and create views for members_company1 and members_company2.
A basic select does not know it is a view or a table on the other end.

CREATE VIEW dbo.members_company1
AS
SELECT id, name 
FROM members
where companyID = 1

You could possible even handle insert, updates, and deletes with instead-of

INSTEAD OF INSERT Triggers