The first one is regular , which will take between five and seven days to deliver an order. The second speed, priority , takes between two and four days for delivery. The last one is express , which delivers the order in just one day. Shipping is not processed until the order is verified. Define and explain four types of integrity constraints in database management systems.
Thin arrows represent attributes, while thick arrows indicate subclasses.
Describe as accurately as possible the relationship between attribute A3 and predicate P2. Recall that inverses of attributes are always logically present, even if they are not explicitly drawn and labeled in a conceptual schema. Consider the binary relationship between members of C4 and members of C5. Attribute A8 and its inverse currently represent this. Suppose that we now wish to represent a property of that relationship.