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KajoData articles about data analyst. Practical knowledge about data analysis, tools and careers.
Articles: 43
Career & business
Discover the true story of how a Polish literature graduate went from tracking cigarettes in Excel to becoming a Data Architect earning 25k PLN.
Career & business
Will AI make data analysts and consultants obsolete? Discover why generating slides or code isn't enough and where true human analytical value lies.
Career & business
Positive profit can coexist with falling cash. Follow one cost, margin and payment model with reproducible calculations and explicit assumptions.
Career & business
Discover the unvarnished truth about working as a data analyst. Kajo Rudziński breaks down the myths surrounding English requirements, imposter syndrome, and AI.
Career & business
Discover 6 politically incorrect tips to fast-track your career in data analytics. Learn how to strategically use Excel, SQL, and psychology to win in the corporate world.
Career & business
A list of tools tells me little about what you can deliver. I use one small project to show how to test ten analyst skills, from clarifying a question to explaining a recommendation.
Career & business
One order queue shows how to measure time, fulfilment and cost without hiding delays. Separate orders, parcels, product units and available inventory.
Career & business
One shop, six orders and consistent definitions. Learn to calculate ecommerce KPIs and distinguish sales, contribution after costs and predicted customer value.
Career & business
I explain six areas of data work and the evidence that can show readiness for each. Build your own career map around real responsibilities and a small practical project.
Career & business
I use one delivery problem to compare the work of a manager, a data scientist and a business specialist. Then I show how to plan a small trial of your chosen direction.
Career & business
I show what to delegate to AI, which decisions need explicit ownership and how to detect working code that produces a wrong answer. We walk through a small SQL example and a way to deliver verified analysis.
Career & business
Is AI really replacing jobs in tech? Data from the No Fluff Jobs report shows a surprising trend: more IT job offers, fewer applicants, and growing demand for data specialists.
Career & business
Knowing a definition is a starting point. I show how to explain a technical answer, predict a small example's result and identify the limitation that matters.
Career & business
9 common interview questions explained from a recruiter’s perspective. Learn what employers are really testing and how to answer without ruining a good interview.
Career & business
What is backend data analytics and why dashboards alone are not enough? A deep interview on BI, data engineering, AI, and career switching.
Career & business
Thinking about a career change to data analytics? Learn the four fundamental elements that determine whether a career transition succeeds or quietly falls apart.
Career & business
I use one project to distinguish clarifying a need, investigating data and building a reporting solution that remains useful after delivery.
Career & business
Data cleaning is the foundation of data analysis. Learn why cleaning data takes so much time and how poor data quality breaks analysis and reporting.
Career & business
Three reports show different order counts. I use one example to explain how to investigate the difference, agree on a definition and decide who will fix it.
Career & business
I look at observable behaviour rather than labels: what blocks a team, how to discuss it and how to check improvement. With examples of feedback, knowledge transfer and reviewing your own habits.
Career & business
What does a real career change to data analytics look like? An honest story about learning Python, working with big data, doubts, flow, and growth.
Career & business
Is work-life balance really a myth? A reflective conversation about work, ambition, career choices, and life in data analytics.
Career & business
Wondering whether to work as a freelance or full-time data analyst? Discover the real pros, cons, and hidden pitfalls before you make your decision.
Career & business
Power Query remembers how to prepare data. I explain what it repeats, how to verify the result and why a new source file can still require a change to the rules.
Career & business
I studied Polish literature. Before analysing data professionally, I was trying to understand where my money went. Here is that journey, the skills I could bring with me and the technical work I still had to learn.
Career & business
Ever wondered what a typical week looks like for a data analyst? From dashboards in Power BI and Tableau to SQL, Python, and team meetings – discover what daily life as a data analyst really involves and why this career is so dynamic and rewarding.
Career & business
Build a report you can explain and check. Explore five Power BI skill areas with a tiny exercise covering filters, shares and missing amounts.
expert
Discover what implementing Power BI really looks like and why Copilot won’t replace analysts. Iga Kwiecińska shares practical insights on common mistakes, AI expectations and the role of live training in data analytics.
Career & business
I work through a small reading diary, from defining a row to calculating averages, evaluating a target and explaining missing observations.
Career & business
Start with your goal and audience. Understand free editions, local work and publication, then compare the tools through one consistent exercise.
Career & business
I use one small example to show where Excel helps, what to check after a refresh and how to deliver a workbook someone else can understand.
Career & business
I show how correct figures can support an incorrect story, and how to check denominators, samples, distributions and the scope of a recommendation.
Career & business
I enjoy the moment when numbers begin to explain a specific problem. I work through a question about late deliveries to show what makes analytical work satisfying to me.
Career & business
I walk through five habits to improve in your first analyst role, from agreeing on a report's purpose to discussing your development. With examples of a brief, a blocker update and a handover, without promises of job security.
Career & business
Explore the transformative potential of AI in the realm of data analysis. Discover whether AI will replace data analysts or if it will simply reshape the role.
Career & business
Knowing a tool can feel like independent analysis. I show how to check your foundations, limit a project and explain a result whose limitations you understand.
Career & business
Before choosing a career from a list of technologies, try solving a small problem in two different ways. I compare the work, the responsibility and what you can learn from each experiment.
Career & business
I use one delivery scenario to show how the question, output and checks change between analysis and predictive modelling.
Career & business
I explore the less comfortable parts of analysis and the questions that help you understand how a particular team actually works.
Career & business
Removing duplicates takes a click. Deciding what counts as a duplicate takes thought. I explain five stages of data cleaning and how to check that the tidy result still answers the original question.
bez kategorii
Thinking about becoming a data analyst? Learn how to successfully transition into a data analyst career with these essential skills and tips.
Career & business
A query can run successfully and still answer the wrong question. Work through order grain, joins, missing amounts and a reproducible reconciliation.
Career & business
You can prefer quiet work and still collaborate well. I look at the conversations involved in data analysis and how to give them a useful structure instead of constantly improvising.
