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
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
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.
Mon 08 Sep 2025 | Jules Claeys
SSIS - Git and version control
As all good data engineering tool, SSIS is compatible with Git and Github. Just like Git would with other types of files and pieces of code, Git can recognise changes in an SSIS file and allows you to track changes, collaborate as a team, roll back to earlier versions and more
Sat 06 Sep 2025 | Christopher Andrew Young
Prep, Parameters and Projects: A Fifth Week at the Data School
This week we were taking a trip back to the Tableau Ecosystem, learning about how different softwares and tools work, as well as learning more tools in Prep and Desktop. This week was our final Friday Client Project, before the Week Long Client Projects begin
Sun 07 Sep 2025 | Rosh Khan
Pivoting and Unpivoting (Snowflake)
Working with tables often means reshaping data — sometimes you need to turn rows into columns, and other times columns back into rows. That’s where PIVOT and UNPIVOT come in.
They can feel a bit confusing at first, but once you see a few examples, it starts to click
Sat 06 Sep 2025 | Daniel Bostrom
dbt Architect Certification
A few weeks ago, I took and passed the new dbt Architect exam
Fri 05 Sep 2025 | Mandy Wan
Highlighting Min/Max Values Over Time in Tableau
Imagine that you are the CEO of a leading supermarket chain. At a glance, total sales tell you how the business is performing overall
Thu 04 Sep 2025 | Matthew Kelleher
My path to the Data School
My path to the Data School began with a love for math. In college, I was drawn to subjects like Calculus, Logic, Set Theory, and Statistics. But I ultimately chose to major in Anthropology and minor in Psychology—fields that helped me explore how people think, behave, and interact with the world
Thu 04 Sep 2025 | Aaron Holstein
JOIN with greater than etc. aka. non-equal JOIN comparison operators
Intro
What are comparison operators? Well, I suspect everyone has at least seen them before:
Operator
Meaning
=
Equal
<>
Not equal to
>
Greater than
>=
Greater than or equal to
<
Less than
<=
Less than or equal to
Equations are the normal context for comparison operators
Wed 03 Sep 2025 | Aaron Holstein
“Show me the numbers” or visual best practices for BAR CHARTS
Intro
As most of us might have heart already there are better and worse forms to visually transform data
Wed 03 Sep 2025 | Kieran Joymungul
Time Intelligence Functions in PowerBi
Below is a PowerBi Report I created explaining how to properly set up and use some of the inbuilt time intelligence functions within PowerBi and a few use case examples
Tue 02 Sep 2025 | Ash Aravindhan
Preppin' Data Challenge: Week 1 2023: The Data Source Bank in Power Query
Let's take a look at the requirements followed by a step-by-step:
1. Input the data: select the data file type you have from the drop down and click transform data to open Power Query
2
Wed 03 Sep 2025 | Anastasiia Larina
Donut Charts in Tableau
In Tableau gibt es leider immer noch keine direkte Option, einen Donut Chart als Diagramm-Typ auszuwählen (anders als z. B. in Power BI). Deshalb müssen wir einen kleinen Trick nutzen
Wed 03 Sep 2025 | Aaron Holstein
DAX
The Acronym
DAX is an acronym and stands for Data Analysis Expressions. Moreover, it’s a language for data modelling, analysis etc. It has been developed by Microsoft and first released in 2009. It is the foundation for for data modelling amongst others in Power BI or Power Pivot in Excel
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