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

General Ledger Data

The general ledger (G/L) is a core foundation financial system that ties together the detailed information collected by subledgers or separate systems for purchasing, payables (what you owe to others), and receivables (what others owe you). As we work through a basic design for G/L data, you’ll discover the need for two complementary schemas with periodic snapshot and transaction fact tables.

General Ledger Periodic Snapshot

We’ll begin by delving into a snapshot of the general ledger accounts at the end of each fiscal period (or month if the fiscal accounting periods align with calendar months). Referring back to our four-step process for designing dimensional models (see Chapter 3: Retail Sales), the business process is the general ledger. The grain of this periodic snapshot is one row per accounting period for the most granular level in the general ledger’s chart of accounts.

Chart of Accounts

The cornerstone of the general ledger is the...