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

Re-using scripts


When developing QlikView documents, we often have to apply the same set of logic or transformations to different data. I have often observed QlikView developers taking a copy-paste approach for re-using a script. While this approach may initially work, it does make the script a lot harder to maintain. When something needs to be changed, you need to change it in each instance of the script, running the risk of different versions of the same transformation process.

In this section, we will look at two better approaches for re-using data. The first is the use of subroutines, which can be used to re-use script within an document. The second is the use of include files, which enables re-use of script between different documents.

Subroutines

A subroutine is a reusable block of script that can be called from other places in the QlikView script by using the CALL statement. This block is formed using the SUB and END SUB control statements. Subroutines can contain parameters so that...