1.1 Some Questions about Data Models
1.4 What Is a Data Model?
1.5 Why Do We Do Data Models?
1.6 Approach to Data Modeling
1.7 Structure of This Book
In this Chapter I set out what I am trying to achieve with this book, describe who the target audience is, and look at some challenges in data modeling that I will address.
1.1. Some Questions about Data Models
What is a data model for? Once upon a time a data model was simply an abstraction of the table and column structure of a database that showed how the tables related to each other. (Today we would probably call this a physical data model.) It was not long before the logical data model was introduced, which would ...