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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
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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.
Fri 16 Jan 2026 | Adrien Sourdille
I built a free, local Speech-to-Text tool and so can you
Last month, I started using a speech-to-text service. I’d never used one before, but I got hooked almost immediately. It was fast, accurate, and made writing feel effortless. For a moment, it felt like a productivity cheat code.
Then the free trial ran out.
Turns out the full version costs $250
Mon 12 Jan 2026 | Le Luu
DES - Data Integration (ETL, ELT, Reverse ETL)
Have you heard of ETL, ELT, Reverse ETL process? What do they mean?
Those are data integration patterns that describe how data moves through a data pipeline, where it is transformed, and how it is used across an organization
Fri 16 Jan 2026 | Tyler Green
Thanks a LOD: A Guide to Fixed, Include, and Exclude LODs
In Tableau, everything is governed by the Viz "Level of Detail." If you drag Region to a row, your data aggregates to the Region level. If you add State, it aggregates to the State level. This is usually helpful, but real-world business questions often ignore these rules
Wed 14 Jan 2026 | Tomo Mensendiek
Tip for text heavy dashboards (Hide them!)
How to make text heavy dashboards more readable. An easy way to hide text in tableau.
Fri 16 Jan 2026 | David Gandary
Using the USING clause in SQL
USING is a cleaner join syntax that lets you join tables by a column name, as long as that column exists in both tables with the same name
Thu 15 Jan 2026 | Roshan Desai
Tableau's Order of Operations
Order of Operations:
Firstly, what is the Order of Operations in Tableau? It is the order in which tableau does things to your data before it shows up on your screen.
Therefore, to understand how Tableau works it is useful to understand the order in which it manipulates and filters your view
Thu 15 Jan 2026 | Tobin Hardy
Take the Blue Pill or the Green Pill: understanding filters in Tableau
You may have noticed in Tableau that some fields are BLUE and some are GREEN. But have you ever wondered why they are different colours?
In Tableau these colours represent which fields are discrete and which are continuous
Fri 09 Jan 2026 | Lorna Brown
What did it take to get into DS55
And just like that we are on our 55th cohort of The Data School. Let's see what it took to get in
If you are interested in joining you can apply for The Data School here
Wed 14 Jan 2026 | Daniel Bostrom
How to store secrets using environment variables in Python
If you're writing Python code in which you authenticate with an external system, you're likely using some kind of confidential secret (an API key, a password, a token, etc.)
Wed 07 Jan 2026 | Sita Pawar
Global Trends in Lunar Folklore
The Mythology and Folklore Database offers a centralized, digital compendium of data on folklore and oral traditions, largely based on the Berezkin Motif Catalogue.
Mon 12 Jan 2026 | Tomo Mensendiek
How to Dark Mode in Tableau
This is a very simple way to make an interactive dashboard that toggles between light and dark themes.
I linked a dashboard I built using this concept and also resources for format/style choices.
Tue 13 Jan 2026 | Nicola Huetz
Save the Date: Some useful date calculations for Tableau
This is an overview and explanation of the most common date calculations.
Want to know more?
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