Numa Begum

Numa is a blend of being highly analytical with a creative visionary approach. You'll find she approaches any problem with creative solutions and strong insights, all whilst retaining beautiful design.

She has led a team to produce a professional suite of dashboards with clean design and analytical depth that answer key industry challenges. Salesforce will use these dashboards to demonstrate Tableau to industry specialists. She has designed a quarterly HR KPI report within Power BI with DAX functions to save 32 hours of work each year for the head of data for HQ and Corporate Projects.

Numa is skilled in - Power BI and Tableau Data Visualisation - Data Transformation in Alteryx, Tableau Prep, and Power Query - Querying with SQL - Agile Project Management

Out of the office, you can find her indulging in art or learning golf.

Blog Posts

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Thu 04 Jan 2024 | Numa Begum
Power BI DAX: How to work out new customers for this year
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Wed 03 Jan 2024 | Numa Begum
Power Query Tips: How to clean up spelling mistakes and typos
This is the start of a blog series providing you with tips for data preparation within the Power Query interface and advice for using M code to achieve this! Setting the scene: You have a dataset which has spelling mistakes of the same value
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Wed 03 Jan 2024 | Numa Begum
Power Query Tips: How to append queries with the table name as a column
This is the start of a blog series providing you with tips for data preparation within the Power Query interface and advice for using M code to achieve this! Setting the scene: You have imported your data from an Excel file, and have many sheets for different stores about your employees
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Thu 30 Nov 2023 | Numa Begum
Dashboard Week: Day 4 and 5
The task set was to produce a dashboard using the IMBd dataset set in Tableau's Movie + Data challenge. There was a lot of free scope in what we could produce, with the only caveat being to have a unique story from each other and to stay within the terms and conditions of the challenge
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Wed 29 Nov 2023 | Numa Begum
Dashboard Week: Day 3 - Explane Spatial Analytics To Me
That's right, it's an Alteryx day for DS41! That means we can only do our analysis and presentation within Alteryx and Alteryx server. We were tasked to connect to this aviation API (https://docs.aviationapi.com/?ref=thedataschool.co
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Tue 28 Nov 2023 | Numa Begum
Dashboard Week: Day 2 - I have a wager this will be in Power BI
... and it was! Today Jenny gave us data from the Organisation of Economic Co-operation and Development (OECD) which had 8 datasets about wages and pay! We were tasked to pick at least 2 datasets and complete the data preparation in Power Query and visualisations in Power BI
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Mon 27 Nov 2023 | Numa Begum
Dashboard Week: Day 1 - Hitting the shops!
16 weeks of training and here we are! 9 am this morning I eagerly read what Jenny had in store for us, and it was a shopping price comparison tool that used the ONS historic retail data
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Wed 01 Nov 2023 | Numa Begum
Alteryx Macros: Getting Started
A macro is described as a workflow that is packaged up into a single Alteryx tool, this means it can be saved, reused, shared and inserted into other workflows! This is great, as it can standardise processes, as one person can build out the logic for a workflow that others can use
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Wed 13 Sep 2023 | Numa Begum
Data School Application: How to Stand Out
If you're reading this, you're probably starting your application for the Data School. If so, I have got 5 tips you need to know to get started! (psst if not, take a look here to get clued up on the process https://www.thedataschool.co.uk/apply/) 1
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Tue 31 Oct 2023 | Numa Begum
Spatial Analytics in Tableau & Alteryx
Spatial analytics is important for data that represents location or geographical points. Tableau and Alteryx have spatial tools within the software to allow for analytical preparation and visualisation of spatial data
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Tue 24 Oct 2023 | Numa Begum
Valorant API in Alteryx
Valorant is a first-person shooter game by Riot Games, for this blog I will show you how I used a publicly available API to retrieve the game data, which I can transform and clean to potentially create a dashboard
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Wed 18 Oct 2023 | Numa Begum
SQL Subqueries and CTEs
Within SQL users can use the result of one query within another query (query-ception), this can also be described as a nested or inner query. This is similar to using a Level of Detail (LOD) calculation. This is useful for more complex queries that may rely on the condition of another query
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Thu 26 Oct 2023 | Numa Begum
Shadowing at IAG Cargo
As a part of our training at the Data School, we were given the opportunity to shadow another DS-er who is currently on placement. Today, I've been shadowing Dorinna Pentchev at IAG Cargo which handles the cargo division of international airlines
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Thu 19 Oct 2023 | Numa Begum
Snowflake SQL: Creating a Table
This blog will cover creating a table and inputting your data using SQL code within Snowflake. The SQL code to create a table starts with a CREATE TABLE operator CREATE TABLE TIL_Playground.Temp
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Tue 24 Oct 2023 | Numa Begum
Getting Started with APIs
An API stands for an application programming interface. It is a pipeline to get data easily from a server. There are many different types of APIs, however in this blog we will just focus on REST APIs. An easy way to understand APIs is through the Request and Response Schema
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Wed 18 Oct 2023 | Numa Begum
How to Have a Clean and Sleek SQL Handover
Ensuring your SQL code is easy to read is essential for spotting mistakes as well as easing the adoption process for whoever may have to read it next!
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Tue 17 Oct 2023 | Numa Begum
An Introduction to SQL
SQL stands for Structured Query Language, this is a programming language that allows the user to access and manage databases through writing commands to retrieve, modify, insert, and delete data
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Mon 09 Oct 2023 | Numa Begum
Power BI: Creating a Bump Chart
A bump chart tracks the change of rank by position of different categories over time. This is effective in visualising trends of rank position in relation to each other. I will show you how to build this chart using the Tableau Superstore dataset, for the rank of different sub-categories by sales
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Sun 08 Oct 2023 | Numa Begum
The Neuroscience of Visualising Data
Humans love patterns. At night we stare up at the stars and see constellations and in the day we stare up at the clouds and see anything from a dinosaur to your sister's bad perm. This pattern-seeking behavioural phenomenon is a natural part of our brain's behaviour and learning
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Wed 27 Sep 2023 | Numa Begum
Alteryx Analytical Apps
An analytical app within Alteryx is a workflow that has a user interface, this allows the end-user to control aspects of the workflow such as changing parameters so they can execute a workflow without building it, automating the process.
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Fri 15 Sep 2023 | Numa Begum
Data School Meet and Greet, Why You Should Go!
Before I applied to the Data School I attended a meet and greet, and it made me so much more confident in my application. In this blog, I will list all the benefits of attending a meet and greet and state why it may actually improve your chances of getting accepted into the data school
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Thu 07 Sep 2023 | Numa Begum
Tableau Server and Tableau Cloud
Both platforms in Tableau are used to store visualisations, data sources and workflows however there are some key differences. Below you will find a summary of the points of difference
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Thu 31 Aug 2023 | Numa Begum
Power BI Journey.05: Logical Functions
This blog is part 3 of an introductory guide on how to use DAX (Data Analysis Expressions). Today will be covering logical functions within Power BI Desktop
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Thu 31 Aug 2023 | Numa Begum
Power BI Journey.04: Date Functions
This blog is part 2 of an introductory guide on how to use DAX (Data Analysis Expressions). Today will be covering date functions within Power BI Desktop
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Thu 31 Aug 2023 | Numa Begum
Power BI Journey.03: Text Functions
This blog is an introductory guide to how to use DAX (Data Analysis Expressions) for text functions within Power BI Desktop. This is to be used to create calculated columns, which are columns created by the user that are calculated from a row level
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Sat 02 Sep 2023 | Numa Begum
DS41's Favourite Office Games
One month into training, and as a cohort we have definitely settled into the office culture at TIL. Here is a fun blog, documenting what we have been playing in the office as a cohort
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Thu 31 Aug 2023 | Numa Begum
Power BI Journey.06: Data to Viz, in a Whiz #MM
Today Robbin Vernooij challenged us to an extended #MakeoverMonday challenge (2023 week 19) to wrap up our introductory week of Power BI. Read up on all the steps I did to get from start to end!
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Sun 20 Aug 2023 | Numa Begum
Elevate your PowerPoints.01: Colour Theory
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Wed 30 Aug 2023 | Numa Begum
Power BI Journey.02: Learning DAX
This blog highlights what I have learnt for formatting in Power BI! This involves conditional formatting using legend, rules, gradients and field values. Then use data analysis expressions with DAX for further formatting. This included filters, slicers, parameters and analytic references
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Wed 30 Aug 2023 | Numa Begum
Power BI Journey.01: WOW 2021 Wk 2
This is the start of my blog series documenting my progress with Power BI. This week I completed a challenge on Workout Wednesday, which you can find here: https://workout-wednesday.com/pbi-2021-w02/ The task was to build a KPI dashboard with key BANs, trends and break-down charts
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Wed 23 Aug 2023 | Numa Begum
Joins, Blends and Relationships: what is the difference?
You may have heard these terms used when using multiple datasets, but do you know the difference between them?   When there is a common column in two tables, a join condition can be made which combines these columns. For instance, these tables can be joined below
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Tue 22 Aug 2023 | Numa Begum
A Clean Way to Merge Columns in PowerQuery
Today was my first time trying out PowerQuery and PowerBI
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Mon 07 Aug 2023 | Numa Begum
Diary of a Data School Newbie
After reading endless blogs from previous data schoolers, exploring Tableau and getting through to the interview
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Wed 16 Aug 2023 | Numa Begum
The Gamification of Data Preparation
Have you ever felt stuck trying to prepare your data? Here is some motivation to improve your data prep skills by treating it like a game! I have been using Tableau Prep using the challenges on https://www.preppindata
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Thu 10 Aug 2023 | Numa Begum
Drawing out your Data Journey
…and you don't need to be an artist! A huge lesson I learnt in my very first week at the data school is that a plan is what takes you from chaos to clarity when preparing and cleaning a dataset. A plan is the difference that will make or break you in data preparation
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