Fundamentals of Information Systems
9th Edition
ISBN: 9781337097536
Author: Ralph Stair, George Reynolds
Publisher: Cengage Learning
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Chapter 5, Problem 5DQ
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Describe three m-commerce applications used by you.
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Subject: Database management system
Explain in easy way with write handwritten note
a. What is lossy decomposition? Check whether the following decompositions are lossy or lossless.
(i) Let R=ABCD, R1 = AD, R2 = AB, R3 = BE, R4 = CDE, R5 = AE, F={ A->C, B- >C, C->D, DE->C, CE->A}
(ii) R (XYZWQ), FD= {X->Z, Y->Z, Z->W, WQ->Z, ZQ-> X, R1 (XW), R2 (XY), R3 (YQ) , R4 (ZWQ), R5 (XQ)
b. Eliminate redundant FDs from
(i) F={X->Y, Y->X, Y->Z, Z->Y, X->Z, Z->X}
(ii) F = {X->YZ, ZW->P, P->Z, W->XPQ, XYQ, YW, WQ ->YZ}
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Chapter 5 Solutions
Fundamentals of Information Systems
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Ch. 5 - Prob. 11LOCh. 5 - Prob. 1.1RQCh. 5 - Prob. 1.2RQCh. 5 - Prob. 1.1CTQCh. 5 - Prob. 1.2CTQCh. 5 - Prob. 2.1RQCh. 5 - Prob. 2.2RQCh. 5 - Prob. 2.1CTQCh. 5 - Prob. 2.2CTQCh. 5 - Prob. 3.1RQCh. 5 - Prob. 3.2RQCh. 5 - Prob. 3.1CTQCh. 5 - Prob. 3.2CTQCh. 5 - Prob. 4.1RQCh. 5 - Prob. 4.2RQCh. 5 - Prob. 4.1CTQCh. 5 - Prob. 4.2CTQCh. 5 - Prob. 1SATCh. 5 - Prob. 2SATCh. 5 - Prob. 3SATCh. 5 - Prob. 4SATCh. 5 - Prob. 5SATCh. 5 - Prob. 6SATCh. 5 - Prob. 7SATCh. 5 - Prob. 8SATCh. 5 - Prob. 9SATCh. 5 - Prob. 10SATCh. 5 - Prob. 11SATCh. 5 - Prob. 12SATCh. 5 - Prob. 13SATCh. 5 - Prob. 14SATCh. 5 - Prob. 15SATCh. 5 - Prob. 16SATCh. 5 - Prob. 17SATCh. 5 - Prob. 18SATCh. 5 - Prob. 1RQCh. 5 - Prob. 2RQCh. 5 - Prob. 3RQCh. 5 - Prob. 4RQCh. 5 - Prob. 5RQCh. 5 - Prob. 6RQCh. 5 - Prob. 7RQCh. 5 - Prob. 8RQCh. 5 - Prob. 9RQCh. 5 - Prob. 10RQCh. 5 - Prob. 11RQCh. 5 - Prob. 12RQCh. 5 - Prob. 13RQCh. 5 - Prob. 14RQCh. 5 - Prob. 15RQCh. 5 - Prob. 16RQCh. 5 - What is source data automation? What benefits can...Ch. 5 - Prob. 1DQCh. 5 - Prob. 2DQCh. 5 - Prob. 3DQCh. 5 - Prob. 4DQCh. 5 - Prob. 5DQCh. 5 - Prob. 6DQCh. 5 - Prob. 7DQCh. 5 - Prob. 8DQCh. 5 - Prob. 9DQCh. 5 - Prob. 10DQCh. 5 - Prob. 11DQCh. 5 - Prob. 12DQCh. 5 - You are a member of the engineering organization...Ch. 5 - Prob. 14DQCh. 5 - Prob. 15DQCh. 5 - Prob. 1PSECh. 5 - Prob. 2PSECh. 5 - Prob. 3PSECh. 5 - Prob. 1WECh. 5 - Prob. 2WECh. 5 - Prob. 3WECh. 5 - Prob. 1CECh. 5 - Prob. 2CECh. 5 - Prob. 3CECh. 5 - Prob. 1.1CSCh. 5 - Prob. 1.2CSCh. 5 - Prob. 1.3CSCh. 5 - Prob. 2.1CSCh. 5 - How important do you think the communication and...Ch. 5 - Prob. 2.3CS
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