sql
SQL & data extraction
Troubleshooting, tuning and querying relational databases, built on three years in technical support.
Freelancer · Canton of Bern · Switzerland
Data Analyst & Power BI Specialist from Switzerland.
I turn complex raw data into interactive dashboards and share my journey from web developer to data professional out in the open.
- Raw data
- SQL
- Power Query
- Star schema
- Decision
Services
What I bring to the table
dax
Power BI & DAX
Fixing broken measures, time intelligence and building robust star schemas.
etl
ETL & Power Query
Automated cleaning of messy datasets.
Portfolio
Dashboards in action
Executive Financial Dashboard
A supplier grows its revenue while losing operating profit. Three dashboard pages showing where, since when and how much — including a margin bridge and a scenario simulator.
Read the case study →
Project 2
Title and description will follow once the project is far enough along.
Project 3
Title and description will follow once the project is far enough along.
Project 4
In planning.
More use cases and hands-on projects to follow.
Journal
From the blog
About
Hi, I'm Nils.
I'm a 28-year-old IT specialist from the canton of Bern, and I live for clean code and numbers that add up. My path started in web design, but my real passion is giving data a structure. Whether I'm querying SQL databases on my Linux machine or writing DAX formulas, I document what I learn in public — to give something back to others and to offer clients complete transparency.
This website was built with support from Claude — both the code and the copy. Where exactly I use AI and where the line runs is set out openly on the transparency page.
- Based in
- Canton of Bern
- Support experience
- 3 years
- Languages
- DE / EN
Contact
Show me your data chaos.
Broken measures, queries that crawl, or an Excel export nobody understands any more? Send me a short note about it and you'll get an honest assessment back.