by Kajo Data | Jun 10, 2025 | Work
“I have a weak resume” – it’s a phrase we’ve all heard, and many of us have probably said it ourselves. It comes from both people just entering the job market and those making a significant career change. Sometimes it truly means a lack of...
by Kajo Data | May 26, 2025 | Work
In this episode, I talk with Kamil Brzeziński – the creator of the channel “Jak Nauczyć Się Programowania” (“How to Learn Programming”), and someone I’ve been following for a long time but only now had the chance to speak with. Together, we take a closer look at what...
by Kajo Data | May 8, 2025 | Work
When I started my journey with data analysis, one of the first questions I asked myself was: Tableau or Power BI? Both tools kept popping up in job listings, online courses, and LinkedIn recommendations. On one hand – Power BI, a Microsoft product deeply integrated...
by Kajo Data | May 6, 2025 | Work
For as long as I can remember, the phrase “job of the future” has been used in headlines, industry reports, and career counseling sessions. When I first started my career, the hot trend was big data, then blockchain, and now it’s all about AI....
by Kajo Data | Apr 22, 2025 | Work
In a world where data analysts are expected to know SQL, Python, BI tools, and even AI workflows – Excel is still standing strong. Some see it as basic or outdated, but that couldn’t be further from the truth. The reality is that Excel remains one of the most powerful...
by Kajo Data | Apr 17, 2025 | Work
Most discussions about AI focus on work: who’s going to get replaced, what jobs are at risk, and what skills will survive the automation wave. But there’s a deeper shift happening. One that touches your inner world. One that changes how you process your thoughts. One...
by Kajo Data | Apr 15, 2025 | Work
Working with data isn’t just about writing SQL queries, building dashboards, or creating flashy reports. At its core, it’s about drawing conclusions – and that means using logic, structure, and often, statistics. The problem? You don’t have to be a statistician to...
by Kajo Data | Apr 8, 2025 | Work
I’ve been working with data for a few years now, and I still keep discovering new things in this role. At first glance, it might seem like a data analyst just writes queries and builds reports – but it’s so much more. It’s a blend of tech, business, critical thinking,...
by Kajo Data | Apr 4, 2025 | Work
The world of data is evolving, and companies are increasingly looking for professionals who combine analytical and engineering skills. That’s exactly how the role of Data Analytics Engineer emerged – a hybrid of a Data Engineer and a Data Analyst.But what does this...
by Kajo Data | Apr 2, 2025 | Work
Getting into IT and data analytics is still a great career choice – but what should you do when the market slows down, and there are fewer job openings for juniors? Don’t panic! You can still land a solid first job, but you need to search smarter, not just harder....
by Kajo Data | Mar 31, 2025 | Work
With layoffs happening across the industry, it’s essential to understand how to avoid being among those let go. This isn’t about scaring you but helping you stay valuable in your role and grow in your career. Let’s go over the five most common...
by Kajo Data | Feb 4, 2025 | Work
In today’s rapidly evolving technological landscape, the question on everyone’s mind is: Will AI take our jobs? In this article, I will delve into the future of data analysis in the age of artificial intelligence. I’ll try to answer a question...
by Kajo Data | Jan 30, 2025 | Work
Starting a data analyst career is exciting, but many beginners fall into common traps that can hinder their progress and prevent them from reaching their full potential. In this article, I’ll share the five most common mistakes of beginner data analysts and...
by Kajo Data | Jan 13, 2025 | Work
Data analyst vs programmer – this is a common dilemma for people considering a career change to IT. In this article, I’ll share my thoughts on which path might be a better fit for you, based on my own experience as a data analyst. I’ll compare both...
by Kajo Data | Jan 3, 2025 | Work
Data Analyst vs Data Scientist – it’s a hot topic for anyone considering a career in data. You might have heard the buzz about data science being the “sexiest job of the 21st century.” But is it really all it’s cracked up to be,...
by Kajo Data | Dec 20, 2024 | Work
How to be the best in a team and develop your IT career? This is a question that many ambitious professionals ask themselves. In this article, I will share my experiences and tips to help you achieve success in teamwork and advance your IT career development. Key...
by Kajo Data | Dec 17, 2024 | Work
Do you feel like your youth is already behind you? Do you have the impression that the world has left you behind because you didn’t choose the right career path? Do you see all these young people succeeding in IT and think that you no longer have a chance? I...
by Kajo Data | Dec 11, 2024 | Work
The Unseen Side of Data Analytics: Exploring the Disadvantages and Challenges So you’re thinking about becoming a Data Analyst? That’s awesome! It’s a rewarding career path with tons of opportunities. But like any job, it comes with its own set of...
by Kajo Data | Dec 7, 2024 | SQL
Histograms are one of the most popular tools for analyzing data distribution. While we often associate them with visual charts, their logic and analytical value can also be replicated in SQL. In this article, I’ll show you step by step how to create a simple histogram...
by Kajo Data | Dec 7, 2024 | SQL
Pivot tables are a favorite tool among analysts working in Excel. But what if your data is stored in a SQL database? Can you create something similar in SQL to analyze data in a cross-tab format? The answer is: yes! In this article, I’ll show you how to use GROUP BY...
by Kajo Data | Dec 5, 2024 | Work
Data cleaning. It might not be the most glamorous aspect of a data analyst’s job, but it’s definitely one of the most important. Just like a powerful person who isn’t afraid to get their hands dirty, a data analyst needs to be able to sift through...
by Kajo Data | Nov 29, 2024 | Work
LinkedIn mistakes? Oh yes, you can definitely make them! Job searching on LinkedIn isn’t the same as sending out your resume. While it may not be as popular as traditional methods, ignoring LinkedIn altogether is a mistake. It can help you make valuable...
by Kajo Data | Nov 20, 2024 | Bez kategorii, Work
Thinking about a career as a data analyst? It’s a great time to make the switch. While the job market is competitive, with the right approach and skills, you can successfully transition into this in-demand role. In this post, I’ll share my insights on how...
by Kajo Data | Oct 29, 2024 | Work
Creating a CV can feel like a daunting task, especially when you know it could make or break your chances with a potential employer. After reviewing numerous CVs throughout my career, I’ve seen certain recurring mistakes that can often turn recruiters away. Today,...
by Kajo Data | Jul 30, 2024 | Python
Learn about variables, data types, and operators in Python. Practical examples and applications. Working with data in Python begins with understanding the basic elements of the language, such as variables, data types, and operators. Variables allow for storing and...
by Kajo Data | Jul 26, 2024 | Expert
Today, I have the pleasure of speaking with Magda Kostrzewska, the author of the popular Instagram profile MyDataStory. Magda is an experienced data analyst and data scientist, and in this interview, she will share her fascinating career journey, the challenges she...
by Kajo Data | Jul 26, 2024 | Expert
Kajo Rudziński: Hello everyone. My name is Kajo Rudziński and this is KajoData. We’re returning to the interview format, and I’m very excited about it. Today, my and your guest is Jan Tymiński, known online as DivingDevOps. Our conversation will mainly...
by Kajo Data | Jul 24, 2024 | SQL
Learn advanced techniques for creating SQL queries. Practical examples and applications. SQL (Structured Query Language) is a powerful tool that allows for advanced manipulation and analysis of data in databases. As a data analyst, I use SQL daily to extract,...
by Kajo Data | Jul 24, 2024 | Excel
Learn how to effectively use Excel’s search and reference features, such as VLOOKUP, HLOOKUP, and XLOOKUP. Managing large datasets often requires quickly finding information. Lookup and reference functions in Excel are invaluable in such situations. They enable...
by Kajo Data | Jul 17, 2024 | Python
Python is one of the most popular programming languages, especially in the field of data analysis. It is versatile, easy to learn, and has a rich community, making it an ideal choice for beginners. In this article, I will introduce the basics of Python to help you...
