Question: Repeat Exercise 3.2.1 for the following schemas and sets of FDs: Exercise 3.2.1 Consider a relation with schema R(A,B,C ,D ) and FDs A B

Repeat Exercise 3.2.1 for the following schemas and sets of FD’s:

Repeat Exercise 3.2.1 for the following schemas and sets of FD’s: Exercise

Exercise 3.2.1

Consider a relation with schema R(A,B,C ,D ) and FD’s A B → C , C → D , and D → A.

a) What are all the nontrivial FD’s that follow from the given FD’s? You should restrict yourself to FD’s with single attributes on the right side.

b) What are all the keys of R?

c) What are all the super keys for R that are not keys?

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To repeat Exercise 321 for the given schemas and sets of FDs lets analyze each schema step by step i Schema SA B C D with FDs A ightarrow B B ightarro... View full answer

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