Database Design - attributes

solomon_13000 · November 27, 2011, 2:33pm

I have a table with the following attributes:

Should I make the companyName, companyNumber and country attribute as a single unique value?

Or

Should I make the companyNumber and country attribute as a single unique value?

Thank You.

r937 · November 28, 2011, 2:19pm

can two companies have the same name and different numbers?

can two companies have the same number and different names?

can two companies with the same name or number exist in separate countries?