Book Image

The Data Warehouse Toolkit - Third Edition

By : Ralph Kimball, Margy Ross
5 (1)
Book Image

The Data Warehouse Toolkit - Third Edition

5 (1)
By: Ralph Kimball, Margy Ross

Overview of this book

The volume of data continues to grow as warehouses are populated with increasingly atomic data and updated with greater frequency. Dimensional modeling has become the most widely accepted approach for presenting information in data warehouse and business intelligence (DW/BI) systems. The goal of this book is to provide a one-stop shop for dimensional modeling techniques. The book is authored by Ralph Kimball and Margy Ross, known worldwide as educators, consultants, and influential thought leaders in data warehousing and business intelligence. The book begins with a primer on data warehousing, business intelligence, and dimensional modeling, and you’ll explore more than 75-dimensional modeling techniques and patterns. Then you’ll understand dimension tables in-depth to get a good grip on retailing and moved towards the topics of inventory. Moving ahead, you’ll learn how to use this book for procurement, order management, accounting, customer relationship management, and many more business sectors. By the end of this book, you’ll be able to gather all the essential knowledge, practices, and patterns for designing dimensional models.
Table of Contents (31 chapters)
Free Chapter
Title Page
About the Authors
End User License Agreement


Voyages occur whenever a person or thing travels from one point to another, perhaps with stops in the middle. Obviously, voyages are a fundamental concept for organizations in the travel industry. Shippers and internal logistical functions also relate to the discussion, as well as package delivery services and car rental companies. Somewhat unexpected, many of this chapter’s schemas are also applicable to telecommunications network route analyses; a phone network can be thought of as a map of possible voyages that a call makes between origin and destination phone numbers.

In this chapter we’ll draw on an airline case study to explore voyages and routes because many readers are familiar (perhaps too familiar) with the subject matter. The case study lends itself to a discussion of multiple fact tables at different granularities. We’ll also elaborate on dimension role playing and additional date and time dimension considerations. As usual, the intended...