Computer Science · Database Management Systems
An analytical evaluation is performed on a relation schema to deduce indirect functional dependencies. The following initial dependencies are given: I. A → B II. A → C III. DB → E Calculate the exact derived functional dependencies by applying Armstrong's derived rules of Union (using I and II) and Pseudotransitivity (using I and III).
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- 1AB → C and DB → A
- 2BC → A and DE → B
- 3A → BC and AB → E
- 4A → BC and DA → E✓
Correct answer
A → BC and DA → E
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