Database constraints

Part 1) Identify 4 database constraints (examples can include: Not NULL, primary key, unique, domain; there can be different ones as well). Explain each constraint (40%) and provide an example of each constraint other than the one in the text (15%). The response should be in the order of 500+ words Part 2) HINT: Review the Normalization Process: Parts and Suppliers One-to-Many Example in the Terms and Concepts discussion.