Build your Team
Enhancing your data team with ours
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
Alteryx
Partner of the Year
EMEA
Tableau
Community Impact 2024
EMEA ESMB
DataIQ
Data for Good Champion
Finalist
DataIQ
Best Data Academy or Skills Development
Finalist
Alteryx
Partner of the Year
Europe
DataIQ
Data for Good Champion
Champion
Tableau
Data for Good 2021
EMEA
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 26 Feb 2026 | Britt van der Poel
Tableau Running Slowly? Here's What to Check
Ever found yourself staring at this – regularly?
If so, you're likely working with large data volumes and could benefit from a few performance optimization steps. Performance refers to the speed at which you're able to work in Tableau, and when performance is delayed, so is time to insight
Wed 25 Feb 2026 | Tobin Hardy
Alteryx: Multi-row vs Multi-field formulas
Screenshot of the multi-field and multi-row tool icons
Found within the 'Preparation' tool tab, Multi-Field & Multi-Row Formulas may look and sound very similar (I know I have definitely placed the wrong one in my workflow before) but their roles are very different
Thu 26 Feb 2026 | Britt van der Poel
Reflections on Leading a Client Project
6 weeks into training, I had the exciting opportunity to step into the role of Project Manager for my cohort's first external client project. Leading a team of 7 consultants, my goal was to deliver high-quality work that met the client's needs
Wed 25 Feb 2026 | Miles Cumiskey
Creating WCAG 2.1 Compliant Alternative Text for Tableau Dashboards
The primary goal of data visualization is to communicate insights accurately and efficiently. For professionals who rely on assistive technology, Alternative Text (Alt Text) ensures these insights remain accessible when a visualization cannot be seen
Mon 23 Feb 2026 | Francesca Plaskett
CTEs in SQL - Not alphabet soup but a different way to think about code
Follow along as I walk through what CTEs are and when/how you might use them.
Thu 19 Feb 2026 | Francesca Plaskett
Sub-queries in SQL - Direct your sandwich-related questions elsewhere
Learn how to write a variety of sub-queries in SQL with examples.
Mon 23 Feb 2026 | Jacob Aronson
Cluster Analysis in Tableau
Oftentimes, when an analyst creates a scatterplot they are searching for some kind of correlation between the variables. Although lesser known, scatterplots also open the door to cluster analysis, a quantitative approach for creating subgroups within a larger group of records
Mon 23 Feb 2026 | Durkka Rajasegaram
Introduction to Data Scaffolding ft. a Tableau Prep example
Introducing the concept of scaffolding in data and why we would need it, with a simple example in Tableau Prep for a better understanding.
Mon 23 Feb 2026 | Bethany Haysom
How to be the first project manager
This week I took on the role of Project Manager for our cohort's first client project. This was internal with the mock-company ‘Prep Air’, and was a chance to get our head around the structure of client projects
Mon 23 Feb 2026 | Elda Ketena
Walk through of Week 4 (2023) Data Preppin' Challenge
Data preppin' Challenge Week 4 - 2023
Input Data
Output Data
Whenever you are doing data prep the best thing you can do first is carefully look at the input and output data and plan! This will make the process of cleaning the data much smoother
Sun 22 Feb 2026 | Fotiana Yan
Workout Wednesday Challenge - Step by Step Waterfall Chart
For this Workout Wednesday I've chosen a challenge that incorporates everything that we have learned about Tableau at the Data School so far. It was definitely a lot harder than I initially thought but I've learned valuable techniques
Wed 18 Feb 2026 | Elda Ketena
Pre-attentive Attributes
When visualizing data there are some essential practices that once you adopt will make your data not only more visually appealing but way more digestible.
Length/width
* Length allows the viewer to easily see the highest value
Want to know more?
Whether you're planning for the future or you have a project that needs to get started next week our team are more than happy to help.
Complete our contact form with your name, company email and a brief message and we will get back to you as soon as we can.