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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
Tableau
Community Impact 2024
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Best Data Academy or Skills Development
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.
Fri 08 May 2026 | Fotiana Yan
If I Had to Relearn SQL from Scratch, This is How I’d Do It
What is SQL?
SQL, or Structured Query Language, is the standard language used to communicate with relational databases.
Most modern applications use Relational Database Management Systems (like PostgreSQL, MySQL, SQL Server)
Thu 07 May 2026 | Ben Hayward
How Tableau Prep Bridges the SQL Visual Gap
Before joining The Data School, I worked in a role that threw me straight into the deep end learning SQL and Python for handling data. I had to teach myself from scratch and often found the gap between writing a query and the actual execution to be a massive obstacle
Mon 06 Apr 2026 | Fotiana Yan
Tips on how to prepare for the Tableau Data Analyst Certification
The Salesforce Certified Tableau Data Analyst exam validates a professional's ability to transform data into actionable business insights using Tableau Desktop, Prep and Server/Cloud
Thu 07 May 2026 | Tomo Mensendiek
How does AI work in Tableau Pulse?
In my previous post, I broke down where AI is used in Tableau Pulse and what services it provides, including Insight Summaries, semantic matching in "Ask" Q&A, and the enhanced Q&A in Pulse Discover. That post focused on what users actually get from the output of the AI
Wed 06 May 2026 | Tomo Mensendiek
Where is the AI in Tableau Pulse?
As Tableau puts it, Tableau Pulse helps users “Make smarter, faster decisions with an AI-powered experience.” AI integration, however, can mean a very wide range of things
Thu 07 May 2026 | Bethany Haysom
Dashboard Rework Part 4: Additional Data
Using Tableau Prep to adjust economic data for inflation, and using RegEx to parse columns.
Mon 27 Apr 2026 | Sita Pawar
Designing Key Board Navigation Accessible Dashboards
Accessible design sits within the broader concept of universal design: the practice of building things that work for as many people as possible, regardless of ability, context, or how they're accessing your work
Wed 06 May 2026 | TK Zellers
How Does Data Masking Work?
Protecting People and Privacy in Data
Personally Identifiable Information (PII) has long been a primary concern of data privacy—a clear, defined set of attributes that data professionals, governments, and citizens strive to protect
Wed 06 May 2026 | Sharon Orazulike
YTD, CY VS PY and Rolling 12 Months in Tableau
Date Calculations are super tricky for me, so my best advice is to create a table and view your calculations as you go.
Before anything, you need to make a date parameter.
I set mine as a range to start and stop according to the min and max dates in our order date field
Thu 23 Apr 2026 | Oscar Kriebel
SQL or Prep: How do they compare?
During training at the Data School, we use a lot of different software to manipulate data in some way. The backbone of it all comes from a programming language called SQL (Structured Query Language). SQL comes in many different flavors, the first that we deal with being Snowflake's version
Tue 21 Apr 2026 | Sharon Orazulike
Power Bi Archives 3: The finale
We have finally reached the end of this saga yippieee!!
Here is a collection of calculations I made to create this dashboard.
For the donut chart:
A simple calculate formula to get the sum of costs for that specific date.
Repeat for 2023
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