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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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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.
Tue 26 May 2026 | Shivam Wadhia
SQL: SQs & CTEs
Subqueries and Common Table Expressions are two ways of writing more complex queries in SQL. Both allow for the defining of an intermediate result set which can be used within a larger query. In simpler scenarios, both can be used interchangeably
Wed 27 May 2026 | Stephanie Pichardo
Practical Guide for Applicants: Getting the Most Out of the Data School Blog
By now, if you’re a prospective candidate for The Data School, it’s likely that you’ve been told to check out this blog. On first glance, it may be a bit overwhelming - particularly if you’ve never touched Tableau or other business-intelligence tools before
Thu 21 May 2026 | Serena Purslow
DS56 Dashboard Week Day 2: EFT Performance
For Dashboard Week Day 2, DS56 will analyse historical ETF (Exchange Traded Fund) performance on the London Stock Exchange using Power BI.
Sun 24 May 2026 | Lorraine Ferrusi
Don't Check the Toaster: How APIs and Webhooks Power Your Data Pipeline
I've used APIs in projects. I've heard of webhooks. And until recently, if you'd asked me to explain the difference - really explain it - I would have quietly changed the subject
Fri 22 May 2026 | Tomo Mensendiek
Automating Tableau Cloud Datasource Publishing Using Python, Tableau Hyper API, Tableau Server Client, and GitHub Actions
I know the title is a handful, so I will first breakdown what this project seeks to achieve, along with a list of the services we will use in each step.
And before we start, check out this blog by Le Luu about orchestration which became the inspiration for this project
Tue 26 May 2026 | Ellie Kershenbaum
Designing for Dyslexia and Dyscalculia
Today was our first day of dashboard week! The focus today was on accessibility. I focused on designing a dashboard for people with dyslexia (a learning disability that affects reading and writing) and dyscalculia (which affects the understanding of numbers)
Tue 26 May 2026 | Sharon Orazulike
Simplicity at Its Finest
Day 1 of Dashboard Week and we had to build a dashboard to meet certain accessibility requirements. My focus was on Dyslexia and Dyscalculia.
I wanted the focus of this dashboard to be simplicity. Only one button would need to be toggled to get the relevant information out of it
Tue 26 May 2026 | Oscar Kriebel
Dashboard Week - Day 1: Accessibility
With this week being my cohort's final week of training, it means that it is time for our Dashboard Week! This week, despite it being a shortened week, will have each day creating a dashboard from start to finish. For today, our focus is on accessibility within our dashboards
Tue 26 May 2026 | Martin Regan
Dynamic Alt Text in Power BI: A Step-by-Step Guide
When building public-sector dashboards, accessibility is a priority. To clear a UK Government Digital Service (GDS) assessment, your reporting must meet WCAG 2.2 Level AA guidelines
Tue 26 May 2026 | Elda Ketena
Dashboard Week - Day 1
The day:
The first day of dashboard was kicked off with a presentation on accessibility which was a real eye-opener
Mon 18 May 2026 | Kaori Ikarashi
Why Standard Deviation Matters in Business
Standard deviation is a statistical measure that shows how much data varies or spreads out from the average. It helps to understand whether the data points are closely grouped or widely scattered around the average (mean)
Mon 18 May 2026 | Sean Fei
Calculations In Tableau Prep: Dates (Part 1)
When people think about calculations in Tableau Prep, many of them compare the much larger library of calculations available in Tableau Desktop
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