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
Emerging Partner of the Year
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
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 22 May 2026 | Gerardo Najarro
My Initial Application and First Tableau Dashboard
Before I began working on my initial viz for the application process, I had never opened Tableau before. I had never even seen it before. All I knew about it was that it was a name that would pop up every so often as I went through my grueling job search earlier this year
Fri 22 May 2026 | Tomo Mensendiek
Where to Find Tableau Cloud Credentials
1. Tableau Server URL
Your Tableau Server URL is your Tableau Cloud site URL.
Example:
https://us-east-1.online.tableau.com
You can find this by logging into Tableau Cloud and copying the base URL from your browser.
2
Fri 22 May 2026 | Fotiana Yan
Snowflake 101: How to Set Up Databases, Create Tables, and Load CSV Data
We’ve all been there: you’re in the middle of a training session, a task drops, and suddenly your screen is staring back at you with a pile of CSV data and a blank Snowflake console. I vividly remember that exact moment of panic when I realized I had no idea how to bridge the gap between the two
Thu 21 May 2026 | Fotiana Yan
Stop Nesting Your SQL: Why CTEs Usually Beat Subqueries (And When They Don’t)
When you first dive into SQL, a simple SELECT statement paired with a few JOINs is usually enough to get the job done. But let's be real, real world data questions tend to be messier and more complicated, forcing your queries to require more horsepower
Tue 12 May 2026 | Amelia Young
Dirty Data and How to Tackle it
A guide on how to spot dirty data and how to rectify it!
Wed 20 May 2026 | Kate Loder
Fixed LODs in Tableau: With Include & Exclude Examples
LOD expressions = Level of Detail Expressions
They allow you to compute values at a different level of granularity than the visualisation itself. Fixed LODs are a very powerful and commonly used type of LOD
Wed 20 May 2026 | Fotiana Yan
SQL Joins and Unions Explained Simply
When it comes to combining data in SQL, JOIN and UNION are your go-to tools, but they work in completely different directions.
JOIN vs. UNION at a Glance
* JOIN (Horizontal Combination): This makes your data wider by adding columns
Thu 21 May 2026 | Gerardo Najarro
First Steps Into Consulting
One of the first things introduced to us at The Data School was a simple but important idea: communication is key to a successful experience with a client. I thought I got it. The research exercise we did last week showed me I didn't
Wed 20 May 2026 | Sharon Orazulike
Semantic Modelling in Tableau Next: The Pros and Cons
Semantic modelling
You can create a semantic model utilising the data objects you have saved in your workspace.
Doing so will allow you to create relationships between your different data objects.
Creating relationships follows a similar interface in Tableau Next as it does in Tableau Desktop
Tue 19 May 2026 | Stefani Hermanto
DSNY12's First Week of Training
As we (DSNY12) enter into our second week of training, I wanted to share some thoughts about our first week. (Spoiler alert: it was a blast!)
On Monday, we kicked off with introductions
Tue 19 May 2026 | Helena Reichenvater
Creating Custom Tooltips in Tableau Public
Unlike Tableau Professional, Tableau Public does not offer the option to use custom shapes as marks, making it difficult to create more visually interesting tooltips
Tue 12 May 2026 | Vivek Patel
The Data Modelling Series - Part 3: Putting It to Work
In Part 1, we diagnosed the problem with the Superstore flat file. In Part 2, we pulled that file apart into proper tables and saw how primary and foreign keys hold those tables together
Want to know more?
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