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Our consultants come armed with both technical and soft skills to support you to make the most of your data.
The Data School has been paramount to our success at JLL. It has allowed us to bring in highly skilled Tableau and Alteryx consultants. It saves considerable time trying to recruit contractors as I know their skills and training are to the highest standard. Over the past 5 years my team has developed analytical insights which have generated multi million dollar savings of which a considerable amount can be attributed to the Data School consultants we have had working on projects.
Paul Chapman, Global Director of Performance Management, BI and Innovation at JLL
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What our consultants are working on
We believe that sharing knowledge and expertise is key to driving innovation and growth in the data community. That's why we're excited to share our latest insights, tutorials, and industry trends with you through this blog.
Written by our team of experienced data consultants, these posts aim to solidify their own learning while giving back to the community.
Thu 09 Jul 2026 | Harvey Lloyd-Smith
An Introduction to Git and Version Control
Version control is an essential practice within software development and data engineering and concerns the tracking and management of changes to files
Thu 02 Jul 2026 | Stefani Hermanto
10 Beginner Tips and Tricks for Alteryx Designer
Alteryx Designer is a data preparation tool that can be very powerful if used to its full potential, but as with any software, there can be a learning curve. In this blog post, I'll cover 10 tips and tricks that can help beginners get used to the software and use it more efficiently
Wed 08 Jul 2026 | Salome Grasland
What Actually Happens at a Data School Final Interview
Every recruitment cycle, I hear the same questions from candidates heading into their final interview.
What should I expect? Are there behavioral questions? What should I wear? Is there anything after this?
The short version
You get a dataset ahead of time. You build a Tableau dashboard
Tue 07 Jul 2026 | Maria Andreetti
How Data Granularity Can Shape Analysis
You check into a hotel and get a rate per night. A stock trader watches a price update every millisecond. Both are 'data', but captured at widely different resolutions for very different reasons
Tue 07 Jul 2026 | Sean Fei
Using Local Environmental Variables To Store API Keys: How To Safely Store Credentials For Use In Alteryx
As someone with a coding background, the topic of API keys was a bit of a fun flashback to my college hackathon years. I vividly remember getting yelled at by my team for accidentally pushing our OpenAI API key to github's main branch... what a disaster.
So when I found out that there wasn't a
Tue 07 Jul 2026 | Sean Fei
Fixing Corrupted Tableau Workbooks/ Error Codes In XML
Recently, I had the pleasure of fixing a Tableau Workbook for Tabitha, a Core Consultant here at TIL. The workbook she had been working on had given her an error code (shown below), and it seemed like the file had completely corrupted, with no way to retrieve the previously completed work
Tue 07 Jul 2026 | Ping HIll
How to Find Numbers Equal to a Power of Their Own Digit Sum in Alteryx
In a recent exercise, we were given an Alteryx challenge and asked to understand the workflow well enough to explain it to others. Here's my breakdown of how it works.
The goal of the challenge was to find numbers whose sum of digits, raised to the power of the digit count, equals the number
Tue 07 Jul 2026 | Kaori Ikarashi
Understanding the Transpose and Cross Tab Tools in Alteryx
Transpose and Cross Tab tools are used to change the structure of data in Alteryx. These tools are useful when data needs to be reshaped for analysis.
Transpose Tool
The Transpose tool converts data from wide to long format. It changes selected columns into rows
Tue 07 Jul 2026 | Mila Kholodiy
Mastering the RegEx Tool in Alteryx: Replace, Parse, Match, and Tokenize
The Alteryx RegEx Tool makes text processing faster and more efficient by offering four powerful configurations: Replace, Parse, Match, and Tokenize.
Tue 07 Jul 2026 | Ben Hayward
Creating a 9x9 times table in tableau prep
For this Blog I will outline my solution to Preppin' Data Week 40 2022 which involves taking a single numbers field with two rows and turning it into a 9x9 times table.
To start off its best to plan out what we are going to need
Tue 07 Jul 2026 | Jude Royall
Visualising Arsenal's 25/26 Squad Rotation
Makeover Monday > Excalidraw > Tableau Prep > Tableau Desktop
Tue 07 Jul 2026 | Mila Kholodiy
Tableau Extensions That Make Data Analysis Smarter: A Practical Look at Infotopics Super Tables & Power KPI
Traditional Tableau dashboards are excellent for visualizing trends, but exploring the reasons behind those trends often requires navigating multiple charts. Infotopics' Power KPI and Super Tables extensions simplify this process by combining high-level KPIs with detailed, interactive analysis
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