Question: QUESTION 2 [25 Marks] Discuss the differences between the candidate keys and the primary key of a relation. (4 Marks) Describe the meant by a

QUESTION 2 [25 Marks]

  1. Discuss the differences between the candidate keys and the primary key of a relation.

(4 Marks)

  1. Describe the meant by a foreign key. How do foreign keys of relations relate to candidate keys?

(6 Marks)

  1. Briefly explain a view. Discuss the difference between a view and a base relation.

(6 Marks)

  1. Discuss the advantages and disadvantages of views.

(5 Marks)

  1. Explain the restrictions are necessary to ensure that a view is updatable.

(4 Marks)

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