Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Given the set F = {A→B, AB→C, AC→BD} of functional dependencies, prove the following dependencies by using the Armstrong axioms.
A -> ABC
AD -> BCD
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- If the only information given about variable x2 in an LP is x2 ≥3, what modifications need to be made to the LP to put it in Canonical Inequality Form? You may assume that the rest of the problem is already in Canonical Inequality Form. Be specific and show your work.arrow_forwardanswer both pleasearrow_forwardin imagearrow_forward
- Problem 6. Prove the following in ND. 1. ((A V B)→(AVC)) (AV B) A ¬(B+C) 2. (AV B) → (A AB), (BVC) A (BAC) (AA¬C) V (¬A^C)arrow_forwardLet a, b eR and assume a + 0. Let f : R → R be given by = ax + b. Prove that f is one-to-one and onto by directly verifying 1 the definitions.arrow_forwardGiven R=ABCD and F = {AB→C, C→D, D→A} Which of the following is a BCNF violation? A. C→AD B. ABC→D C. AB→CD D. C→Barrow_forward
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