Book Image

QlikView Unlocked

By : Andrew Dove, Roger Stone
Book Image

QlikView Unlocked

By: Andrew Dove, Roger Stone

Overview of this book

QlikView Unlocked will provide you with new insights to get the very best from QlikView. This book will help you to develop skills to work with data efficiently. We will cover all the secrets of unleashing the full power of QlikView, which will enable you to make better use of the tool and create better results for future projects. In the course of this book, we will walk you through techniques and best practices that will enable you to be more productive. You will gain quick insights into the tool with the help of short steps called ”keys,” which will help you discover new features of QlikView. Moving on you will learn new techniques for data visualization, scripting, data modeling, and more. This book will then cover best practices to help you establish an efficient system with improved performance. We will also teach you some tricks that will help you speed up development processes, monitor data with dashboards, and so on. By the end of this book, you will have gained beneficial tips, tricks, and techniques to enhance the overall experience of working with QlikView.
Table of Contents (16 chapters)
QlikView Unlocked
About the Authors
About the Reviewers
Hidden Image List

Calculations and flags in the script

It's always a good idea to do as much work in the script as possible because the work only needs to be done once when the document is reloaded, not every time the user chooses a particular sheet or object.

Consider this requirement: products with prices between £10.00 and £19.99 need to be shown in a straight table with no other products visible. It would be easy enough to do this as an IF() statement in an expression:

We suppress zero values and hide the column. However, if there are several thousand rows, screen performance could be poor.

It would be better to do the work in the script if we can:

LOAD [Product Code], 
     [Supplier Product Code], 
     [Supplier No], 
     [Manufacturer Product Code], 
     [Manufacturer No], 
     [Short Description], 
     IF(Price > 9.99 AND Price < 20.00, 1, 0) AS [Check Price]
[..\QlikView Unlocked Data.xlsx]
(ooxml, embedded labels, table is Product); 

All we need to do now...