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Slide 1Database Design Chapter Five DAVID M. KROENKE and DAVID J. AUER DATABASE CONCEPTS, 6 th Edition Slide 2 All rights reserved. No part of this publication may be reproduced,…
Slide 1THE RELATIONAL DATA MODEL SECTION 4 General Concepts Slide 2 Introduction E.F. Codd in 1970 Existing databases used physical pointers What is the problem with pointers?…
Slide 1Data Preprocessing Slide 2 Relational Databases - Normalization Denormalization Data Preprocessing Missing Data Missing values and the 3VL approach Problems with 3VL…
Slide 1Functional Dependencies (FDs) Slide 2 A function dependency on a relation means that some attribute is a function of a group of other attributes: A4 = f(A1, A2, A3)…
Slide 1Normalisation 1 Chapter 4.1 V3.0 Copyright @ Napier University Dr Gordon Russell Slide 2 Normalisation Overview –discuss entity integrity and referential integrity…