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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 03 Mar 2026 | Fotiana Yan
Scaffolding in Tableau Prep using LOOKUP and MOVING CALCULATIONS
Scaffolding allows you to create date columns that fill in the gaps of your existing date data. Originally the scaffolding would be done in a more long-winded way but in the latest version of Tableau Prep you can do this by adding New Rows.
Wed 04 Mar 2026 | Oscar Kriebel
Flex Your Data: How to Make Barbell Charts?
A useful aspect of data visualization is that it can allow you to easily compare different categories against each other. One way to do that is through barbell charts
Thu 05 Mar 2026 | Mariia Sapsai
How to build a map which switches with parameters not only the measure, but also the color?
For my Tableau Public I built an “Overview Dashboard” using Superstore data. In this dashboard, I had the idea that Sales should have one color for every visualization, and if I switch to Profit, it should use another color
Wed 04 Mar 2026 | Francesca Plaskett
Back to Basics: Filling down in Tableau Prep, Power Query and Alteryx
Learn with me about filling down in Tableau Prep, Power Query and Alteryx.
Wed 04 Mar 2026 | Adrienne Zhang
How to Do a Cross Join in Alteryx (Using the Append Tool)
A cross join combines every row from one dataset with every row from another, producing every possible combination.
To do this in Alteryx, bring both tables into your workflow as separate inputs.
Then, you’re going to want to use the “Append” Tool, which can be found under the “Join” Tools
Wed 04 Mar 2026 | Tobin Hardy
Power BI: Dumbbell charts using Error Bars
This week some colleagues and I discussed how dumbbell charts could only be made in Power BI through the use of Viz extensions. Hence, when I found #WOW 2025 Week 19 which challenged me to build a 3-point dumbbell chart using error bars in Power BI I knew I had to accept
Tue 17 Feb 2026 | Vivien Lee
WOW2022 W22 - More Parameter Actions
Week 7 is here!! Today's blog runs through the Workout Wednesday we did today (WOW2022 W22) which has been really satisfying to build.
PLAN
So we know we need 4 charts which need to be ranked, and we also need a 'player parameter'
Mon 02 Mar 2026 | Le Luu
Tile Tool in Alteryx - Equal Records
In the previous blog, I shared the "Equal Sum" method in the Tile Tool in Alteryx. With the "Equal Sum" method, you can split the category into equal tiles. However, you cannot split the number of each category to equal values for tiles
Tue 03 Mar 2026 | Fotiana Yan
The Most Powerful DAX Functions I've Discovered So Far!
DAX knowledge is essential in making the most of data analysis in PowerBI, as it enables you to get deeper into the details and
Thu 19 Feb 2026 | Le Luu
DES - Orchestration and Trigger Setup
In the previous blog, I shared about the data engineering lifecycle from the raw data source to the endpoint. If you haven't read it, feel free to check it here. If you look at the diagram in that blog, in the undercurrent part, there's an orchestration process
Mon 02 Mar 2026 | Fotiana Yan
Beyond the Basics: Why You Need AVERAGEX in Power BI
Iteration functions or "X" functions in PowerBI are a build on to the usual aggregation functions, written with an X as suffix (SUMX, AVERAGEX etc). They enable you to create more complex measures or columns, by evaluating expressions for each row
Sat 07 Feb 2026 | Vivien Lee
Power BI - AVERAGEX and Interactivity
It's my first full Power BI blog! Today I'm running through an example of some charts we built that uses AVERAGEX and average lines.
My favourite thing about Power BI is how it automatically connects visuals on the page
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