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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.

Sat 11 Oct 2025 | Elizabeth Archer
Sorting dates within a filter in Tableau
I recently wanted to be able to show the dates in a filter with the most recent dates at the top (sorted descending). Within a filter you can usually change the sort order by changing the default properts > sort. However, this does not work with date data types


Tue 14 Oct 2025 | Megan Harrington
How to make an accordion (or collapsible) bar chart
Accordion (or collapsible) charts can help keep dashboards clean by showing key information first and letting users expand sections for more detail when needed. This approach makes dashboards easier to read and more flexible for different users


Mon 13 Oct 2025 | Ayo Popoola
Fixing a bar at the top of a chart using parameters
Last week, I made a tutorial on how to fix a bar to the top of a bar chart using sets, and mentioned how this could also be done using parameters. I thought it was only right I give a little tutorial on how to do this so no stones are left unturned

Tue 19 Aug 2025 | Joseph Hughes
First Power BI Day: Embedding Reports
Today we had our first day learning Power BI. As well as learning about some different chart types and building a dashboard, we also learned how to embed our reports. Hopefully this is a useful guide as to how to do the same!
1) Publish your Power BI report to your workspace

Mon 13 Oct 2025 | Joseph Hughes
What I Learned From Teaching: Takeaways from TIL Training Day
As someone who's spent the last 10 weeks learning at the data school, it was a nice (albeit challenging) change of pace to consolidate what I'd learned and have a go at teaching members of the public. In this blog I'll go over some of my biggest takeaways from the experience

Fri 10 Oct 2025 | Zainul Abedin Natha
Power BI PL-300 Exam: My One-Week Study Plan and What I Learned
After successfully passing my Power BI PL-300: Microsoft Data Analyst exam, I wanted to share a quick summary of the resources and strategies that helped me prepare , all within a week of focused revision


Sat 11 Oct 2025 | Christopher Andrew Young
DAX, Public Teaching and Client Projects: A 10th Week at the Data School
This week had a different structure, with a front loading of the client project and the Learn What The Data School Learns Public Session on Thursday.
Client Project
Due to scheduling the first two days of the week were both full days focused on the client project


Wed 08 Oct 2025 | Christopher Andrew Young
PowerBI: Advanced Dumbbell Chart and Custom Tooltips
Sometimes, you need to show 3 values along a dumbbell chart. This could be to show the comparison over time between 2 points with an intermediatory point, to showcase the extent of value changes between a similar period of time
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