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The DDL ( Database Definition Language ) can be used to specify B constraints:a . domain constraints b . referential integrity,sudashans wellest e and serim

The DDL (Database Definition Language) can be used to specify B constraints:a. domain constraints b. referential integrity,sudashans wellest e and serim "Database system Concepts', * etin, 2020, Ac. assertions, andd. autho
(/8 marks) The DDL (Database Definition Language) can be used to specify constraints:
a. domain constraints
b. referential integrity,
c. assertions, and
d. authorization
For each of these four constraints a-d above give a definition (1 mark each) and give an example in the real world where the constraint would be useful (1 mark each). Hint: domain constraints have two fundamental aspects, remember to include both in your answer. For referential integrity, do not include in your answer the how (e.g., mechanics of how it is enforced with PKs and FKs), instead focus on the concept. Lastly, do not mix up assertions with other constraints.
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