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

Procurement Transactions and Bus Matrix

As you begin working through the four-step dimensional design process, you determine that procurement is the business process to be modeled. In studying the process, you observe a flurry of procurement transactions, such as purchase requisitions, purchase orders, shipping notifications, receipts, and payments. Similar to the approach taken in Chapter 4: Inventory, you could initially design a fact table with the grain of one row per procurement transaction with transaction date, product, vendor, contract terms, and procurement transaction type as key dimensions. The procurement transaction quantity and dollar amount are the facts. The resulting design is shown in Figure 5-1.

image

Figure 5-1 Procurement fact table with multiple transaction types.

If you work for the same grocery retailer from the earlier case studies, the transaction date and product dimensions are the same conformed dimensions developed originally in Chapter 3: Retail Sales. If...