Question

Dashboard Go to Help Search Courses estion 1 yet wered A B с arked out of 0 1 2 Flag estion 2 2 7 1 1 3 7 5 8 3 Given the above relation: 1. Please identify 6 functional dependencies O

Database Management

Answer 1

PLEASE FIND THE ANSWER(S) and EXPLANATION BELOW.

In a Functional dependency X->Y, for every value in X, we have a unique value in Y/

As we have a unique column C, we have the following dependencies straight forward:

1. C->A
2. C->B
3. C->AB
4. Then, For every unique value of A, we have unique B that is, 1->2, 2->1, and 7->3. So, another Dependency is: A->B
5. Then, For every unique value of B, we have unique A that is, 2->1, 1->2, and 3->7. So, another Dependency is: B->A
6. Then, For every unique value of AC, we have unique B that is, 13->2, 27->1, and 25->1 and 73->8. So, another Dependency is: AC-> B

Hence, the total Functional dependencies are:

1. C->A
2. C->B
3. C->AB
4. A->B
5. B->A
6. AC->B

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