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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 24 Mar 2026 | Shabnam Dost
Order of Operations in Tableau
This week I want to write about the 'Order of Operations' in Tableau...
First things first...
Step 0: The Structure
Before you even see a sheet, you have to tell Tableau how the data fields even talk to each other. Joins and Relationships come into the story
Sat 04 Apr 2026 | Shivam Wadhia
Level of Detail Expressions in Tableau: An Intro
Level of Detail (LOD) expressions can be technical, so this is the first of two posts. We begin with the basics.
Aside from table calculations, which I've written about here, and level of detail calculations, Tableau has two other calculation types. We start with these
Sun 05 Apr 2026 | Durkka Rajasegaram
Workout Wednesday 2023 week 31: LODs
The different LODs needed (and why) to create the bar chart for the Workout Wednesday week 31 challenge.
Thu 26 Mar 2026 | Fotiana Yan
Fill Down 3 Ways: Alteryx, Tableau, and Power Query Compared
This week, I've decided that I needed to refresh some skills that I've learned a few weeks ago and what better way to do that other than Data Preppin Challenges!
Thu 02 Apr 2026 | Le Luu
REST API Connector in Tableau
In the past, I've written several blogs on how to fetch data from calling an API using Python scripts with TabPy in both Tableau Desktop and Tableau Prep Builder. If you haven’t checked them out yet, feel free to explore those posts (Tableau Desktop, Tableau Prep)
Fri 03 Apr 2026 | Janina Grauel
Color: Stop Decorating and Start Designing
Using my LinkedIn feed as an indicator, I can confidently say that color is one of the most discussed topics in the data viz community. Coming from a fashion design background, the idea that color needs intention is very familiar
Thu 02 Apr 2026 | Lily Kiziriya
How to: Cross Tab in Alteryx
You may know it by another name: the pivot. In Alteryx, you want to use the crosstab tool when you want to reshape your table so that a subset of the data points from your rows can be separated into a new column.
Lets look at the setup for the cross tab
Fri 27 Mar 2026 | Tomo Mensendiek
Recursion in SQL (Factorials!)
Recursion is a concept used to solve a large problem by breaking it down into smaller, similar problems. It works by having a function call itself repeatedly until a specific condition is met.
Let’s look at an example: the factorial
Wed 25 Mar 2026 | Lily Kiziriya
Data Transposing for Tableau (and visualization in general) - A Case Study
This week I met up with a friend to burn the midnight oil if you will, and they were working on a dashboard that used data that had to do with global monthly temperatures through a range of years
Fri 27 Mar 2026 | George Rycroft
Fixed Level Of Detail Calcs
Level of Detail (LOD) calculations can be a daunting thing when you are new to Tableau, but understanding them can make your analysis so much easier. In this blog I will guide you through how to use Fixed LOD's in Tableau
Wed 01 Apr 2026 | Tobin Hardy
Creating UK Postcode Regions in Tableau
I recently worked on a project where our client wanted to visualise the distribution of a measure across different UK regions. However, regions, perhaps due to their ambiguity, are not automatically mapped by Tableau
Wed 01 Apr 2026 | Charles Yi
Where's Your HEAD at? A Guide to Reverting in Git
Once, a client asked me to revert a dbt project to the state it was in two weeks ago. Long story short, there were some changes to reporting that required us to go back in time.
It sounded easy enough
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