Ali Agah

While studying law at the University of York, Ali discovered a passion for Consulting while developing a marketing strategy for a videogame marketing company. Upon graduation, Ali joined Helios, an aviation consultancy, where he worked with the European Commissions to support the development of the Single European Sky.

While at Helios, Ali came to understand the value of helping decision-makers see and understand useful data. This is where he began his data journey. Diving deep to learn a variety of tools, he became a regular participant of Andy Kriebel’s Makeover Monday before joining The Data School and becoming a Tableau and Alteryx expert. He now proudly holds a Tableau Data Analyst certification and Alteryx Designer Advanced certification.

As part of the Data School, Ali has helped the likes of Coca Cola, Mastercard, IAG Cargo and Telereal Trillium make the most of their data. He has experienced using Tableau, Alteryx, SQL and Snowflake to deliver high quality reports and automations. Not to mention training over 700 people worldwide in Tableau.

He now looks forward to the next step in his data journey!

Certifications

Blog Posts

Avatar
Mon 14 Nov 2022 | Ali Agah
Formatting Numbers as Time Duration
We’ve all dealt with the frustration of having a number that represents time in some way. It’s one of the moments when computers’ lack of understanding of context really shines. A common occurrence is when we have a duration but want to represent it in a way that makes sense
Avatar
Fri 07 May 2021 | Ali Agah
Tableau: filtering a filter
In this blog, I explore two ways of creating cascading filters.
Avatar
Sat 19 Jun 2021 | Ali Agah
Five Different Ways to Add Reference Lines
Most people have a go-to way of adding reference lines to their chart. Yet, there are many ways to add reference lines, each with its own strengths. Read on to expand your context-adding horizons.
Avatar
Thu 03 Jun 2021 | Ali Agah
Why are populated Date & Time fields Null in Tableau?
These values are clearly not Null as String but return as Null when converted to Date & TimeTableau is normally clever with Date fields and Date & Time fields but it's not perfect
Avatar
Fri 04 Jun 2021 | Ali Agah
Preppin' Data on Snowflake
This is how I solved Preppin' Data Challenge 2021 week using SQL on Snowflake.
Avatar
Fri 04 Jun 2021 | Ali Agah
Regex in Snowflake: escaping character \
If you're using backslash sequences (e.g. \d) on Snowflake's Regex functions, you may have wondered why it doesn't work as expected. Here's the fix!
Avatar
Fri 07 May 2021 | Ali Agah
How to hide containers in Tableau
Sometimes I don't want to clutter up a dashboard by adding lots of text, filters and parameters but I also want the keep the interactivity they afford. So... I add them to the dashboard and hide them.
Avatar
Wed 05 May 2021 | Ali Agah
Two ways to stop users clicking where you don't want them to
Sometimes there are items on the dashboard that you just don't want your users to interact. Here I teach you two tricks I learned from Andy's channel [https://www.youtube.com/channel/UCTlX7UpqASrldmx5_CpG3CA]
Avatar
Thu 29 Apr 2021 | Ali Agah
Nine ways to create calculated fields
There are many ways to create calculated fields in Tableau. Here are nine different ways; each with their own advantages and disadvantages. Which should you use?
Avatar
Fri 23 Apr 2021 | Ali Agah
Using Alteryx Macros to Revive My Company Social Life
I used Alteryx to randomly allocate my cohort into groups so we can socialise in smaller groups. Here's how you too can create a macro to randomly allocate things to however many groups you want.
Avatar
Tue 13 Apr 2021 | Ali Agah
Sketching My Dashboards | My New Favourite Tool: Excalidraw
Sketching your ideas is an important step in creating a Dashboards. Excalidraw is my new favorite tool for this! In this blog, I talk about why I like Excalidraw and briefly go into how to use it.
Powered by The Information Lab
1st Floor, 25 Watling Street, London, EC4M 9BR
Subscribe
to our Newsletter
Get the lastest news about The Data School and application tips
Subscribe now
© 2025 The Information Lab