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

Sorting tables


We will now introduce the Order By statement, which is added to a Load statement and is used to sort an input table based on certain fields. There is one major condition for the Order By statement to work: it must be applied to a Load statement getting data from a Resident table, not from a table file or any other source.

Some databases can receive Order By instructions in the Select query, but in this section we will only deal with Order By statements on the QlikView side.

The Order By statement must receive at least one field name over which the ordering will be performed and, optionally, the sort order (either ascending or descending). If the sort order is not specified along with the field name, the default sort order will be applied, which is ascending.

An example script of an Order By statement at play is:

Load
 Region,
 Date,
 Amount
Resident SalesTable
Order By Date asc;

In this script, we are loading three fields (Region, Date, and Amount) from a previously loaded table...