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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 11 Aug 2025 | Joss Lazenby
Columns to rows or rows to columns? When should you pivot data?
Data can be recorded in both a long format, typically preferred for reading by machines, and in a short format, which is more intuitively read by humans
Mon 11 Aug 2025 | Olivia Millar
My First Week at Data School: Tables, Views, Keys and Schemas
Hello everyone, I am Olivia from cohort DS53, and here is my first blog post of hopefully many more. For my first week, I wanted to cover key theory I picked up on my first official day of The Data School in order to fully grasp what a database fundamentally is and what it is made up of
Mon 11 Aug 2025 | Joseph Darton
Intro to Tableau Prep
As part of Learning What the Data School Learns, I prepared a walkthrough of a Tableau Prep workflow which covers the following steps:
1. Union
2. String, Date, and Number manipulation
3. Join
4
Mon 11 Aug 2025 | Salome Grasland
Making Action Filters Work with LODs in Tableau
If you’ve ever built a Tableau dashboard with action filters and Level of Detail (LOD) expressions, you might have hit this frustrating snag:
Your FIXED LODs ignore the action filter.
That’s because FIXED LODs are calculated before most dimension filters—unless the filter is part of context
Mon 11 Aug 2025 | Hannah Norfolk
Using Variables in DAX: A Guide to Cleaner, Faster Formulas
Tired of writing long, clunky DAX formulas that are a nightmare to read? There’s a simple fix — variables.
What are Variables?
Variables work as placeholders for expressions that you can refer to later on within the same DAX calculation
Sun 10 Aug 2025 | Ash Aravindhan
Tableau Prep: Date Functions
During the first week of training at the Data School, we covered a variety of techniques for planning and preparing data to ensure we have a clean usable dataset for further analysis.
An important aspect of the data preparation, particularly in tools like Tableau, is mastering dates
Fri 08 Aug 2025 | James Gastaldello
Join Me! - Working with Multiple Data Sources
Data rarely comes in one single table, so learning how to combine information from multiple sources is a crucial skill. This post covers the basics of how joins work and how they help turn multiple datasets into a single, unified source for analysis
Sun 10 Aug 2025 | Christopher Andrew Young
From Blank Stares to Star Schemas: A First Week at the Data School
Setups, schemas, socialising and a stray football. A first week experience at The Data School.
Sun 10 Aug 2025 | Zainul Abedin Natha
Mastering Parameters in Tableau with Superstore Data: Switching Metrics
Parameters in Tableau aren’t just for filtering — they can also switch entire measures in your visualizations
Sun 10 Aug 2025 | Zainul Abedin Natha
Mastering Parameters in Tableau with Superstore Data - "Top N Parameter"
Parameters in Tableau are like control knobs for your dashboards. They let users change values on the fly — switching measures, setting thresholds, or adjusting rankings — without editing the workbook.
When used well, parameters turn static charts into interactive decision-making tools
Sun 10 Aug 2025 | Zainul Abedin Natha
Creating Sets in Tableau
What Are Sets in Tableau?
Sets are custom fields that define a subset of your data based on specific conditions.
Think of them as membership-based — a data point is either in the set or out of the set.
🔹 Types of Sets:
* Fixed Sets: Manually select members
Sun 10 Aug 2025 | Rosh Khan
My Experience and Advice on Passing the Alteryx Advanced Exam
Exam summary:
* Duration: 2
Want to know more?
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