Welcome to my new blog!

Hi, I’m Tamas.

I’ve spent the last 8+ years working in data analytics — building dashboards, writing SQL, defining KPIs, and sitting in countless meetings where the number one request was: “How can I export this to Excel?”

What I Actually Do

I’m a Data Analyst. A Data Visualization Expert. A Business Intelligence Consultant. Sometimes a Business Analyst. Sometimes a junior Data Engineer.

In this field, you wear a lot of hats.

In practice, I:

• Write complex SQL across multiple databases (PostgreSQL, Oracle, and BigQuery)
• Build decision-focused dashboards in Tableau, Power BI, and QlikSense
• Translate vague business questions into measurable KPIs
• Improve data models and backend structures when needed
• Help stakeholders understand what’s actually possible with BI tools

Why This Blog Exists

Most dashboards fail for the same reasons:

• Too many metrics
• Too many data sources
• Weak data modeling
• No clear understanding of business requirements
• No real business impact

Data visualization is not just about fancy charts.

It’s a structured, visual way of presenting complex information in a way that’s easy to understand.

This blog documents how I approach:

• Dashboard design
• Data storytelling
• SQL optimization
• KPI frameworks

What You’ll Find Here

Real Projects

Public datasets. Honest breakdowns. Clear reasoning.

Design Thinking

Why this chart? Why this layout? Why this filter? What problem does it actually solve?

Backend Perspective

Every good dashboard starts in the database.

Data modeling and query performance matter more than color palettes.

My Goal

To share what I’ve learned as a data analyst — and yes, occasionally show you how to export the report to Excel.

This blog is a public record of that journey.

If you’re interested in:

• Data visualization best practices
• Tableau or Power BI development
• Writing better SQL
• Building dashboards that actually influence decisions

You’re in the right place.