Book Image

QlikView for Developers

By : Miguel Angel Garcia, Barry Harmsen
Book Image

QlikView for Developers

By: Miguel Angel Garcia, Barry Harmsen

Overview of this book

QlikView is one of the most flexible and powerful Business Intelligence platforms around. If you want to build data into your organization, build it around QlikView. Don't get caught in the gap between data and knowledge – find out how QlikView can help you unlock insights and data potential with ease. Whether you're new to QlikView or want to get up to speed with the features and functionality of QlikView, this book starts at a basic level and delves more deeply to demonstrate how to make QlikView work for you, and make it meet the needs of your organization. Using a real-world use-case to highlight the extensive impact of effective business analytics, this book might well be your silver bullet for success. A superb hands-on guide to get you started by exploring the fundamentals of QlikView before learning how to successfully implement it, technically and strategically. You'll learn valuable tips, tricks, and insightful information on loading different types of data into QlikView, and how to model it effectively. You will also learn how to write useful scripts for QlikView to handle potentially complex data transformations in a way that is simple and elegant. From ensuring consistency and clarity in your data models, to techniques for managing expressions using variables, this book makes sure that your QlikView projects are organized in a way that's most productive for you and key stakeholders.
Table of Contents (24 chapters)
QlikView for Developers
Credits
About the Authors
Acknowledgements
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Dealing with slowly changing dimensions


A slow changing dimension is one whose values vary across undefined time periods, that is, it can have different meanings depending on the time period context.

To illustrate the concept, consider the evolution of Joey, a support technician employee in a given company, over a certain period of time. When Joey joined the company, he had the Junior Support Technician position. Then, after one year, he gets promoted to Senior Technician. And now, one year later, has become the Support Manager.

Now, imagine you want to visualize the number of cases resolved by the entire support team over a three-year period and find out how many of those cases were resolved by junior technicians, how many were resolved by senior technicians, and how many were resolved by the support manager. If, for reporting purposes, we take Joey's current status in the company, all cases he has resolved in the last three years will be logged as if they were resolved by the Support Manager...