(Answered) Determining the types of constraints

Engineering

Question 1: What is a referential integrity constraint, and why are these constraints important?

Question 2: What happens to our database if we don't put in our referential integrity constraints?

Question 3: What are other types of constraints?

Question 4: Any ideas on how the constraints are implemented/enforced?

Question 5: Do constraints have anything to do with normalization?

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