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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.
Mon 30 Mar 2026 | Elda Ketena
Dummy Highlight Tip
When first using sets and parameter for interactivity you might notice that when a value/dimension is selected it greys out everything else.
In order to get the output we can insert a dummy highlight to get the result below:
1
Sat 28 Mar 2026 | Elda Ketena
A How to Guide at Sets and Parameter Actions - Drill downs
What are Sets and Parameters?
Sets are for grouping data (deciding who is "In" vs "Out"), while Parameters are input dials that let users change a value in a calculation or filter
Mon 30 Mar 2026 | Laura Brylka
The five qualities of great vizualizations according to Alberto Cairo
Recently, our cohort explored the amazing books available to us in The Information Lab library. One particular book caught my eye: The Truthful Art by Alberto Cairo.
Cairo is one of the big names in the field
Mon 30 Mar 2026 | Elda Ketena
Understanding Level of Detail (LOD) in Tableau: A Simple Guide
When working in Tableau, you will often hear the term LOD or Level of Detail.
LOD expressions are very useful tools for analysing data, and are often found to be very confusing concepts.
But What is Level of Detail?
In Tableau, calculations normally depend on the dimensions in your view
Thu 26 Mar 2026 | Harvey Lloyd-Smith
Fixed LODs vs Self Join Aggregations In Tableau Prep
LOD (level of detail) calculations allow you to make calculations at a specific level of granularity. They enable more precise control over what level of detail the data is aggregated over. This is something which standard aggregations in Tableau Prep fail to do
Mon 30 Mar 2026 | Elda Ketena
Intro to Alteryx Functions
In Alteryx, formulas are used to clean data, format fields and find insights. In this blog I will go into more detail about the key formulas used and the some of tools in which they're used.
The tools where you would use formulas most:
Today I will be focusing on the filter and formula tool
Mon 30 Mar 2026 | Bethany Haysom
Preppin' Data Challenge in SQL
This week I learned SQL, and to consolidate my knowledge I wanted to attempt a Preppin’ Data Challenge (2022 Week 3).
This challenge asks you to combine two datasets from ‘The Prep School’ to see how many students are passing their classes
Tue 24 Mar 2026 | George Rycroft
Joins, Relationships & When to Use Them
Joins in data preparation can often stump people, but this guide aims to simplify the differences between each type. There are four types of joins; Inner, Left, Right and full Outer. They allow you to connect multiple datasets to each other, based on common fields
Fri 20 Mar 2026 | Francesca Plaskett
Back to Basics: PIVOT! ing in Tableau Prep, Alteryx and Power Query
Learn how to pivot in this step-by-step tutorial across multiple data preparation platforms.
Wed 25 Mar 2026 | Kate Crawford
Tableau Cloud Portals: Embedding published workbooks inside dashboards
Too Many Tabs
The Problem
While supporting a team with publishing to Tableau Cloud, they wanted separate workbooks to feel like a single product. The team already had a strong brand strategy with custom colors and supporting documentation
Sun 29 Mar 2026 | Sharon Orazulike
How to Make Dynamic Titles in Tableau Desktop
First Method: Using Filters
This one is a quick and easy tutorial.
First, let's connect to sample superstore on Tableau desktop and build a quick and easy map.
Double click State/Province, put sum(sales) on colour and put region on filter and lets go!
The Map should look something like this
Thu 26 Mar 2026 | Durkka Rajasegaram
Getting Started with SQL
Introducing and explaining the commands needed to write a basic query in SQL.
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