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
1
Cover
2
Title Page
3
Copyright
4
About the Authors
5
Credits
6
Acknowledgements
29
Index
30
Advertisement
31
End User License Agreement

Supertype and Subtype Schemas for Heterogeneous Products

In many financial service businesses, a dilemma arises because of the heterogeneous nature of the products or services offered by the institution. As mentioned in the introduction, a typical retail bank offers a myriad of products, from checking accounts to credit cards, to the same customers. Although every account at the bank has a primary balance and interest amount associated with it, each product type has many special attributes and measured facts that are not shared by the other products. For instance, checking accounts have minimum balances, overdraft limits, service charges, and other measures relating to online banking; time deposits such as certificates of deposit have few attribute overlaps with checking, but have maturity dates, compounding frequencies, and current interest rate.

Business users typically require two different perspectives that are difficult to present in a single fact table. The first perspective is...