•(UserID,CreditCard#)->Credit Card company
UserID, DateOrdered, and ItemID were used as primary key because they can uniquely identify each order.
•(UserID,DateOrdered,ItemID)->Expected Delivery Date
•(UserID,DateOrdered,ItemID)-> Expected Return Date
UserID and ItemID were chosen as primary key because they can uniquely identify each Rating
•(UserID,ItemID)->Number of Stars
UserID and ItemID were used as the primary key Because they uniquely identify each Reservation.
3.Changes From Previous
No changes were made from the previous model