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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
Alteryx
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EMEA
Tableau
Community Impact 2024
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Data for Good Champion
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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.
Fri 19 Dec 2025 | Mariia Sapsai
How to build a spiral chart?
I will use the dataset Superstore.
Before we started, we also needed to create a new table in Excel or Google Sheets, where we write names – Range and numbers 0 and 1. You can see it below in the screenshot.
After that, we open our Tableau and add our first table – Superstore
Fri 19 Dec 2025 | Salome Grasland
Dynamic KPI Formatting in Tableau: A Practical Guide (With Direct CASE Examples)
When you use a parameter in Tableau to swap between KPIs, you inevitably run into the formatting problem:
* Revenue should look like $12,540,
* User count should look like 1,294,
* Conversion rate should look like 23
Wed 10 Sep 2025 | Claudina Mukangabo
Dynamic KPI's in Tableau
Dynamic KPIs are essentially numbers that update automatically as new data becomes available. Instead of being locked to a specific date, these KPIs always look at the latest period, so your dashboard stays current without requiring manual updates
Wed 17 Dec 2025 | Olivia Millar
The "Impossible" Group By: Aggregating Data Based on Table Calculations in Tableau
Grouping products into categories based on running cumulative sales presents a specific challenge in Tableau. To calculate a "Running % of Total", every single product is required in the view to define the sort order. However, creating a summary table requires removing that product detail
Wed 17 Dec 2025 | Robin Jones
Crafting a Doughnut Chart in Tableau: A Step-by-Step Guide
Doughnut charts are a fantastic way to visualise proportions, offering a clean and impactful alternative to
Sun 14 Dec 2025 | Aisha Senkubuge
From Learning to Teaching: Reflections from Learn What The Data School Learns
In week 10 of training, my cohort took part in our 'Learn What The Data School Learns' session, where we stepped out of the student role and into the instructor role to teach members of the public some of the tools we have been learning. Going into the session, I felt a mix of nerves and confidence
Sun 14 Dec 2025 | Aisha Senkubuge
Variables in Power BI DAX
As I continue learning Power BI and working more with DAX, one concept that has become increasingly important is the use of variables. At first, variables can feel optional, especially when a measure already works without them
Thu 11 Dec 2025 | Kib Cheung
How I Approach Makeover Mondays: From Daunted to Dashboarding
Makeover Mondays felt daunting when I started. It was hard to see how to improve a viz while still learning good dashboard practices. This blog shares my structured approach, and how I stopped replicating charts and started finding the insight and story
Thu 11 Dec 2025 | Robin Jones
DS54 Takes the Stage: Teaching the Tableau Essentials to the public and clients
Today was a massive milestone for my cohort, DS54! We hosted our very own 'Learn What The Data School Learns' (LWTDSL) session,
Wed 10 Dec 2025 | Mel Niere
Alumni Spotlight - From Discord to Data : Lyon’s Journey from DSNY2 to Lead Analyst at AIM
Learn how an online teacher hacked his way into data.
Tue 09 Dec 2025 | Francesca Plaskett
Bopping to the top - Moving your selected category to the top of your chart in Tableau
A step-by-step guide on how to dynamically move a parameter-selected category to the top of a sorted field.
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.