I‘m Klaus Aschenbrenner, a Microsoft Certified Master for SQL Server
» I help people to bring their SQL Server & PostgreSQL
installations to a new level of excellence. «
SQLpassion Offerings
SQLpassion helps businesses get the most out of SQL Server & PostgreSQL – from smooth setups to better performance and long-term stability. As a Microsoft Certified Master, I offer tailored consulting, hands-on workshops, and share my expertise at international events – all with a clear focus on delivering real results.
Read one of my latest blog posts:
Don’t Miss Out – SQL Server Query Tuning Fundamentals Starts Next Monday!
Next Monday, February 9, 2026, my one-day live online training SQL Server Query Tuning Fundamentals will take place! This hands-on session is designed to help DBAs, developers, and consultants deeply understand how SQL Server executes queries and how you can systematically improve performance with smarter indexing and execution-plan analysis. If you’re still on the fence
Spatial Data with PostGIS in PostgreSQL
Developers coming from SQL Server often approach PostgreSQL with the assumption that spatial functionality will look and behave more or less the same. After all, both systems expose geometry and geography types, both support distance calculations, and both offer spatial indexes. That assumption is only partially correct. While PostgreSQL with PostGIS covers everything SQL Server
BRIN Indexes in PostgreSQL
When SQL Server professionals start working seriously with PostgreSQL, most of the learning curve feels comfortable. Tables behave as expected, transactions are familiar, and B-tree indexes look reassuringly similar to what you have used for years in SQL Server. Then you encounter BRIN indexes. At first glance, they seem almost reckless: no row pointers, no
Watch one of my latest YouTube videos:
Introducing my new PostgreSQL Quickies Series on YouTube
For many years I have been publishing my SQL Server Quickies – short, focused videos that explain specific database topics in just a few minutes. These quick sessions have helped countless developers and DBAs to sharpen their skills without the need to spend hours in front of lengthy tutorials. Now it’s time to expand this concept into
Online Recording: Exploring PostgreSQL for SQL Server Developers and DBAs
On January 9 I have done an online presentation about Exploring PostgreSQL for the SQL Server Developers and DBAs for the Cloud Data Driven User Group. You can find the recording of the whole session (around 105 minutes) here to watch: If you’d like to explore the differences between SQL Server and PostgreSQL in greater depth,
SQL Server Quickie #48 – Azure SQL Managed Instance
Today I have uploaded SQL Server Quickie #48 to YouTube. This time I’m talking about Azure SQL Managed Instance. If you are interested in learning more about this very interestingh topic, I highly recommend to check-out my live training about it that I run from November 27 – 28, 2024.
