Book Image

QlikView 11 for Developers

Book Image

QlikView 11 for Developers

Overview of this book

Business Intelligence technologies are a must-have in every business to make informed decisions and keep up-to speed with the ever-evolving markets. QlikView's disruptive technology makes it a key player and leader in the industry; with its flexibility and powerful analytics environment, building QlikView apps can be mastered by both, business users as well as developers. This book will help you learn QlikView Development from a basic to a practitioner level using a step-by-step approach in a practical environment, and apply proven best practices on each topic. Throughout the book, we will build a QlikView app based on real data about Airline Operations that will help "HighCloud Airlines" make informed business decisions and analysis-guided strategies. HighCloud Airlines executives are evaluating if entering the US market is a good strategy and, if so, which line of business should they focus their investments on; they need QlikView to make the best decision. The application will be evolving chapter by chapter, along with your skills, going from a simple proof of concept to creating a Data Model, adding a custom style, building a Dashboard and handling and manipulating the source data via script. We will meet the "HighCloud Airlines" requirement by using many different data visualization objects and time-saving techniques. The whole application uses real data taken from the Bureau of Transportations statistics of the US and encompasses the operations of Airlines both domestic and international. With three years worth of data, you will help HighCloud Airlines discover where people travel the most, which are the Carriers with the most market share, what is the average load factor per airline, which aircraft is the most used to perform flights, which are the busiest airports, and a whole universe of new insights.
Table of Contents (23 chapters)
QlikView 11 for Developers
Credits
Foreword
About the Authors
Acknowledgements
About the Reviewers
www.PacktPub.com
Preface
Index

Dealing with different data types


As we've seen in the previous section, QlikView offers a complete toolbox for dealing with data. In this section we will be looking at some of the most important operators and functions for dealing with strings, numbers, dates, and times.

Strings

Strings are pieces of text; in QlikView these are often used to provide context to the numbers. You may have noticed that in the script, strings are always enclosed between single quotes (').

String operators

The most common operation performed on strings is concatenating two or more strings together into a single string. This is achieved by using the & operator, for example:

[First Name] &' '& [Last Name] 

This concatenates the values of First Name and Last Name, with a space between them, into a single string containing the full name.

String functions

The following table shows the most important string functions.

Function

Explanation

Example

Result

len(string)

Returns the length of a string.

len...