The symbol → indicates functional dependency in the context of a relational…
GATE · 2024 · CS · Set 1 · Computer Science & IT
The symbol → indicates functional dependency in the context of a relational database. Which of the following options is/are TRUE?
- A.
(𝑋, 𝑌) → (𝑍, 𝑊) implies 𝑋 → (𝑍, 𝑊)
- B.
(𝑋, 𝑌) → (𝑍, 𝑊) implies (𝑋, 𝑌) → 𝑍
- C.
((𝑋, 𝑌) → 𝑍 and 𝑊 → 𝑌) implies (𝑋, 𝑊) → 𝑍
- D.
(𝑋 → 𝑌 and 𝑌 → 𝑍) implies 𝑋 → 𝑍
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