Book Image

QlikView for Developers Cookbook

By : Stephen Redmond
Book Image

QlikView for Developers Cookbook

By: Stephen Redmond

Overview of this book

QlikView has been around since 1993, but has only really taken off in recent years as a leader in the in-memory BI space and, more recently, in the data discovery area. QlikView features the ability to consolidate relevant data from multiple sources into a single application, as well as an associative data model to allow you to explore the data to a way your brain works, state-of-the-art visualizations, dashboard, analysis and reports, and mobile data access. QlikView for Developers Cookbook builds on your initial training and experiences with QlikView to help you become a better developer. This book features plenty of hands-on examples of many challenging functions. Assuming a basic understanding of QlikView development, this book provides a range of step-by-step exercises to teach you different subjects to help build your QlikView developer expertise. From advanced charting and layout to set analysis; from advanced aggregations through to scripting, performance, and security, this book will cover all the areas that you need to know about. The recipes in this book will give you a lot of the information that you need to become an excellent QlikView developer.
Table of Contents (19 chapters)
QlikView for Developers Cookbook
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Parsing text to numbers and dates


Quite often, we have to deal with data that are not in a format that QlikView can interpret as either dates or numbers. In these cases, we need to look at the data interpretation functions, Date# and Num#.

These functions accept a value and a format string. They use the format string to attempt to interpret the value.

In this recipe, we will look at using Date# and Num# functions to interpret our data correctly.

Getting ready

Load the following script:

Load
  Date#(Month, 'DD.MM.YYYY') As Month, 
  Num#(Sales, '#.###,##', '.') As Sales
Inline [
  Month, Sales
  01.01.2013, 1.000
  01.02.2013, 976
  01.03.2013, 1.100
];

How to do it…

These steps show you how to parse text to numbers and dates:

  1. Add a listbox for Sales and Month onto the layout:

  2. Note that the values are right-justified and that they retain the original formatting.

How it works…

The # functions apply a format string to the incoming value. If it parses correctly as number (or date) then it loads the value...