Connecting to MySQL Community Edition with Qlik Sense (System DSN with MySQL ODBC driver)

As of Qlik Sense 3.2.2, the Qlik ODBC Connector package does not connect to MySQL Community Edition servers.

A large number of Linux web servers run on the community edition, so it’s handy to be able to connect and extract information from this data source as well.

Error message: ERROR [HY000] [Qlik][ODBC MySQL Wire Protocol driver]Connections to MySQL Community Servers are not supported. Please contact MySQL to obtain a MySQL Enterprise or Commercial version.
As we can’t use the connector package, we must instead load the MySQL driver and use a Windows DSN. Continue reading “Connecting to MySQL Community Edition with Qlik Sense (System DSN with MySQL ODBC driver)”

Sorting Alternative Dimensions and Measures in Qlik Sense

Alternative Dimensions and Measures have been in Qlik Sense since version 2.2 (see a video on Qlik’s site describing how to use them) – but there isn’t yet an easy way to sort them (as of version 3.2.2).

 

This bar chart object has multiple alternative dimensions and measures (note the arrows next the the axis titles)

 

When configuring charts with alternative dims and measures you’ll find you can only configure the sort order for the currently active dimensions and measures – nothing else will be visible or configurable.

Continue reading “Sorting Alternative Dimensions and Measures in Qlik Sense”

Installing a SSL certificate to Qlik Sense Enterprise on Windows Server 2012 R2

In this post I’m going to look at how quick and easy (and cheap) it is to procure and install a SSL certificate on your Qlik Sense deployment. This assumes you are starting with only the self signed certificates, and that you want to use a certificate generated by a signing authority for use on an externally facing site.

A couple of things to note:

  • I’m using Qlik Sense Enterprise 3.1 with a single-node deployment using the default settings
  • You have a choice of verification methods – I chose to use DNS by adding a CNAME (pointer) to my chosen domain, and managed this through a linux DNS host. You can also verify through email or http (placement of a file)
  • I’ve used a basic certificate from PositiveSSL that offers only domain validation (DV). Certificates offering greater levels of protection and assurance are also available
  • The server is running Windows Server 2012 R2 with IIS 8, which is up-to-date with the latest updates at time of writing (January 2017)

 

On a clean installation of Qlik Sense Enterprise, you’ll note that the domain fails SSL validation in most browsers. Why? Because the certificate is one that has been generated by your server, and not by a “trusted” certificate authority. Have a read of this page about Certificate Authorities if you’re after further detail.

Continue reading “Installing a SSL certificate to Qlik Sense Enterprise on Windows Server 2012 R2”

What is Big Data? Thinking about a definition suitable for me

I recently worked on an app that was loading from several hundred gigabytes of CSVs, and attempting to perform expensive transformations on these files in Qlik Sense. Normally this isn’t a problem, but due to the way the transformation was written, the result was a saturated server…and I found myself reflecting what “Big Data” means to different people (and to myself).

A recruiter’s post on LinkedIn also made me chuckle, as it highlights the disparity between definitions well. From my view of big data, I doubt that someone working in that field is likely to be interested in a role where one of the three core job skills is Excel…

 

Strong in Data Manipulation/Excel/Big Data – so which is it?

 

My observation is that there are two camps – one side that classifies using the “V’s”, and another using an altogether simpler definition! Continue reading “What is Big Data? Thinking about a definition suitable for me”