In the unit 1 assignment, we defined the relations and keys for a library system. In unit 2 we learned about constraints. For your unit 2 assignment, identify and describe the constraints that would be appropriate for the relations that we have within our library system. Constraints that you should consider may include:

Entity integrity constraint Referential integrity constraint Semantic integrity constraint Domain constraint Null constraint Unique constraint

The constraints in Bold type should all be present in your assignment.