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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
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EMEA
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Community Impact 2024
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Finalist
Alteryx
Partner of the Year
Europe
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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.
Mon 28 Sep 2026 | Olivia Millar
Tableau Performance Optimisation: Utilising Built-In Diagnostic Tools
If you have a dashboard you need to optimise for performance and need some help on where to begin, or if you are developing a new dashboard and know performance is a priority from the start, guessing which aspects are causing a performance bottleneck is inefficient
Mon 28 Sep 2026 | Kaori Ikarashi
DAX context: Row context and Filter context
One of the most important ideas in DAX is context.
In simple terms, context is the environment DAX uses to decide which data to look at when calculating a result.
The same DAX measure can return different results depending on where and how it is evaluated
Sun 27 Sep 2026 | Alexander Mackay-Smith
Building a Time Planner in Tableau (Gantt Chart)
After starting at the Data School, one of the first things I noticed was how much I had to keep track of!
There are plenty of great organisation tools out there, but as I am already on a Tableau learning journey, I thought I would attempt to build a planning tool in Tableau
Sun 27 Sep 2026 | Ismail Abdillahi
The part of LODs that confused me and how it finally clicked
Week 2 was mostly Tableau, and the thing that held me up longest was Level of Detail expressions. Not the syntax. The syntax is short
Sun 27 Sep 2026 | Melissa Osorio
Cube Data Sources.
Type of data source in which hierarchies and aggregations have already been created by the cubes designer in advance.
They’re powerful as they can return information often quicker than relational data sources
Fri 25 Sep 2026 | Skyla Patterson
Connect to an API with me in Alteryx: Stardew Valley Wiki
In this blog I'll be walking through how I used Alteryx to connect to Stardew Valley data, a popular farm simulation game. The free API can be found at: https://www.stardewvalleywiki.net/developers. My end goal is to get data on the villagers in the game
Fri 25 Sep 2026 | Holly Phillips
What's a Null?
A null value isn't just zero or empty text, they represent missing or unknown data. Not handling them correctly can lead to inaccurate reporting or confusing dashboards.
There are 2 types of nulls in Tableau:
1
Fri 25 Sep 2026 | Olivia Millar
Tableau Performance Optimisation: Live vs. Extract Connections
When designing a Tableau workbook, simply choosing the right connection type between Live and Extract is one of the simplest but most effective changes you can implement
Thu 24 Sep 2026 | Kaori Ikarashi
What makes a data model semantic?
The word semantic means connected with the meaning of words, language, or other symbols.
Semantic models can be confusing because they look like a normal data model
Thu 24 Sep 2026 | Jude Royall
Goal Sequences using Alteryx and Tableau Desktop
Alteryx to download and transform the data, Tableau desktop to visualise.
Wed 23 Sep 2026 | Amelia Young
Calculations in Tableau Desktop Part 2: Level of Detail Expressions (LODs)
An introduction to Level of Detail Expressions (LODs) in Tableau Desktop with example use cases and syntax.
Mon 21 Sep 2026 | Rahim Afsana
Making Tableau Think: A Guide to Logical Calculations
Choosing the right chart is only half the job. The other half is telling Tableau what to do with your data.
This is where logical calculations come in
Want to know more?
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