Qlik Sense Cookbook - Second Edition

Qlik Sense Cookbook - Second Edition

By : Pablo Labbe, Philip Hand, Neeraj Kharpate

Buy this Book

Qlik Sense Cookbook - Second Edition

By: Pablo Labbe, Philip Hand, Neeraj Kharpate

Buy this Book

Overview of this book

Qlik Sense allows you to explore simple and complex data to reveal hidden insight and data relationships that help you make quality decisions for overall productivity. An expert Qlik Sense user can use its features for business intelligence in an enterprise environment effectively. Qlik Sense Cookbook is an excellent guide for all aspiring Qlik Sense developers and will empower you to create featured desktop applications to obtain daily insights at work. This book takes you through the basics and advanced functions of Qlik Sense February 2018 release. You’ll start with a quick refresher on obtaining data from data files and databases, and move on to some more refined features including visualization, and scripting, as well as managing apps and user interfaces. You will then understand how to work with advanced functions like set analysis and set expressions. As you make your way through this book, you will uncover newly added features in Qlik Sense such as new visualizations, label expressions and colors for dimension and measures. By the end of this book, you will have explored various visualization extensions to create your own interactive dashboard with the required tips and tricks. This will help you overcome challenging situations while developing your applications in Qlik Sense.

Title Page

Packt Upsell

Contributors

Preface

Free Chapter

Getting Started with the Data

Introduction

Extracting data from databases and data files

Extracting data from web files

Extracting data from the FTP server

Extracting data from web services with REST Connector

Activating the legacy mode in Qlik Sense® desktop

Previewing data in the Data model viewer

Creating a master library from the Data model viewer

Using a master library in Edit mode

Using visual data preparation on the data manager model viewer

Visualizations

Introduction

Creating snapshots

Creating and adding content to a story

Adding embedded sheets to the story

Highlighting the performance measure in a bar chart

Associating persistent colors to field values using the script

Using the colormix1 function

Structuring visualizations

Measuring statistical data with box plot charts

Using a waterfall chart to analyze the cumulative effect

Scripting

Introduction

Structuring the script

Efficiently debugging the script

Packaging the code in script files

How to use subroutines in Qlik Sense®

Optimizing the UI calculation speed

Optimizing the reload time of the application

Using a For each loop to load data from multiple files

Using the Concat() function to store multiple field values in a single cell

Executing command-line programs within the script

Managing Apps and the User Interface

Introduction

Publishing a Qlik Sense® application created in Qlik Sense® Desktop

Creating private, approved, and community sheets

Publishing a Qlik Sense® application to Qlik Sense® Cloud

Creating geo maps in Qlik Sense®

Reference lines in a Sales versus Target gauge chart

Effectively using the KPI object in Qlik Sense®

Creating treemaps

Creating dimensionless bar charts in Qlik Sense®

Adding reference lines to trendline charts

Creating text and images

Applying limitations to charts

Adding thumbnails to a clear environment

Navigating many data points in a scatter chart

Using alternative dimensions and measures

Using the visual exploration menu

Useful Functions

Introduction

Using an extended interval match to handle slowly changing dimensions

Using the Previous() function to identify the latest record read for a dimensional value

Using the NetworkDays() function to calculate the working days in a calendar month

Using the Concat() function to display a string of field values as a dimension

Using the Minstring() function to calculate the age of the oldest case in a queue

Using the RangeSum() function to plot cumulative figures in trendline charts

Using the Fractile() function to generate quartiles

Using the FirstSortedValue() function to identify the median in a quartile range

Using the Declare and Derive functions to generate Calendar fields

Setting up a moving annual total figure

Using the For Each loop to extract files from a folder

Using the Peek() function to create a currency exchange rate calendar

Using the Peek() function to create a trial balance sheet

Using the subfield() function to split field into multiple records

Using the dual() function to set the sort order of dimensions

Set Analysis

Introduction

Cracking the syntax for Set Analysis

Using flags in Set Analysis

Using the = sign with variables in Set Analysis

Point in Time using Set Analysis

Using comparison sets in Set Analysis

Using embedded functions in Set Analysis

Creating a multi-measure expression in Set Analysis

Using search strings inside a set modifier

Capturing a list of field values using a Cconcat() function in Set Analysis

Using the element functions P() and E() in Set Analysis

Using the intersection between sets for Basket Analysis

Using alternate states

Using Extensions in Qlik Sense

Introduction

Finding extensions on Qlik Branch

How to import extensions (Desktop and Server)

Using the Variable extension

Using the Reload button extension

Using the simple KPI extension

Using the ShowHide Container extension

Advanced Aggregation with AGGR

Introduction

Using nested aggregations

Using Rank() with Aggr

Combining set analysis with Aggr

Creating an ABC analysis

Tips and Tricks

Introduction

Working with multiple tabs

Using the keyboard to navigate and interact

Working with the distinct clause

Managing variables in the script and layout

Using measure names in object expressions

Creating dynamic charts

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Extracting data from web files

Often, the data required for the purpose of reporting is not stored in a database, but instead needs to be fetched from a website. For example, customer location information, specifically the geographic coordinates used in mapping analysis, is not available internally within an organization. This information may be available on the web and can be extracted from there.

Getting ready

When extracting the data from a web file:

Open an existing Qlik Sense application or create a new one.
Open the Data load editor.
Click on Create new connection and select Webfile.
The Select web file window will open.
Insert the following URL from which you can fetch the data: http://www.csgnetwork.com/llinfotable.html.

Name the connection as QlikSense Cookbook Webfile, as shown in the following screenshot:

How to do it…

In the list under Data connections, select QlikSense Cookbook Webfile and click on Select data. This will open up a preview window listing all the tables from the web page. When you carefully examine the table contents, you realize that it is the second table, @2, that contains the location information.
Check the box next to @2 and ensure that it is selected, so that the correct table is shown in the preview. The user will need to change the value under Field names to Embedded field names.
The preview of the table will look like the following screenshot:

Select all the fields from the table in the preview window. Click on Insert scriptto load the web data in the application.
Name the table as Country_Location and the script will read as follows:

Country_Location: 
LOAD 
Country, 
Capital, 
Latitude, 
Longitude 
FROM [lib://QlikSense Cookbook Webfile] 
(html, codepage is 1252, embedded labels, table is @2);

Save and load the data. Once the script is successfully loaded, the Data model viewer will show the loaded table.

How it works…

Qlik Sense connects to the web file using the stored data connection. Once connected, it identifies the tables in the HTML source and lists them in the preview window.

Certain external websites require authentication in order to be accessed and Qlik Sense is unable to cope with websites that are secured in this manner. In order to get over this issue, we can use a third-party data-extraction tool. The extracted data can be stored in a data file, such as a QVD. The .qvd file can then be used as a data source in the Qlik Sense application.

There's more…

Qlik Sense can also extract data from other data formats, such as XML. The underlying principles remain the same as explained in the preceding recipes.

Qlik Sense Cookbook - Second Edition

By : Pablo Labbe, Philip Hand, Neeraj Kharpate

Qlik Sense Cookbook - Second Edition

By: Pablo Labbe, Philip Hand, Neeraj Kharpate

Overview of this book

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