Does creating a unique index on 2 fields only block the creation of the new record if BOTH fields match?
So to be more clear, does the following work?:
CustomerID: 1, CarID: 5
CustomerID: 1, CarID: 6
CustomerID: 1, CarID: 7
and the following does not?:
CustomerID: 1, CarID: 5
CustomerID: 1...