Teo Lachev

I'm a consultant, mentor, and author, with a focus on the design and implementation of Data Analytics solutions.

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on June 1st (Build Your First Agent in Copilot Studio) - https://t.co/V2LcdFGOUC Atlanta BI fans, please join us in person for our next meeting on Monday, June 1st at 18:30 ET. Elayne Jones (Senior Solution Engineer at Microsoft) will show ...

[Teo Lachev @tlachev]

Replicating BigQuery to Fabric Reloaded - https://t.co/wq7KVzISkn In a previous post, I referred to an engagement where we used the Fabric Copy Job activity to replicate Google BigQuery tables to Fabric, so we can use Direct Lake semantic models. A few months later, the clie...

[Teo Lachev @tlachev]

Replicating BigQuery to Fabric Reloaded - https://t.co/wq7KVzISkn In a previous post, I referred to an engagement where we used the Fabric Copy Job activity to replicate Google BigQuery tables to Fabric, so we can use Direct Lake semantic models. A few months later, the clie...

[Teo Lachev @tlachev]

Power BI Unmaterialized Columns - https://t.co/UxkpCdthke Coming back from a long vacation, I’ve almost missed this interesting Power BI enhancement: Power BI unmaterialized calculated columns. Normally, I avoid the traditional DAX calculated columns for a variety of reasons...

[Teo Lachev @tlachev]

Direct Lake Composite Models - https://t.co/f6sIZ62QqX I’ve mentioned previously in the “A Couple of Direct Lake Gotchas” post that unlike Power BI reports, Excel surprised me by not showing user-defined hierarchies in a Direct Lake model. Direct Lake comes with other gotcha...

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on March 2nd (Your First Steps in Microsoft Fabric Using Just SQL) - https://t.co/QdGlJcqDlR Atlanta BI fans, please join us in person for our next meeting on Monday, March 2nd at 18:30 ET. Shabnam Watson will show you how you can apply you...

[Teo Lachev @tlachev]

A Couple of Direct Lake Gotchas - https://t.co/YfYMiwHOsq I’m helping an enterprise client modernize their data analytics estate. As a part of this exercise, a SSAS Multidimensional financial cube must be converted to a Power BI semantic model. The challenge is that business...

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on February 2nd (Power BI Translytical Taskflows) - https://t.co/0UvBZMKdnT Atlanta BI fans, please join us in person for our next meeting on Monday, February 2nd at 18:30 ET. Sukhwant Kaur (Product Manager at Microsoft) will show you how s...

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on January 5th (Visual Calculations in Power BI) - https://t.co/n87MOQhKtj Atlanta BI fans, please join us in person for our next meeting on Monday, January 5th at 18:30 ET. Dean Jurecic will show you how Power BI visual calculations can si...

[Teo Lachev @tlachev]

First Look at Fabric IQ: The Good, The Bad, and The Ugly - https://t.co/CLHXaCJJNv Telegraph sang a song about the world outside
Telegraph road got so deep and so wide
Like a rolling river…

The Telegraph Road, Dire Straits

At Ignite in November, 2025, Microsoft intro...

[Teo Lachev @tlachev]

Performance and Cost Considerations from Power BI Pro/PPU to Fabric - https://t.co/3ilqrBWeCk What performance and cost considerations should you keep in mind if you are currently on Power BI Pro/PPU, but Fabric looks increasingly enticing?

Performance

Performance is d...

[Teo Lachev @tlachev]

Prologika Newsletter Winter 2025 - https://t.co/JEOJN93CC9

If Microsoft Fabric is in your future, you need to come up with a strategy to get your data in Fabric OneLake. That’s because the holy grail of Fabric is the Delta Parquet file format. The good news is that all F...

[Teo Lachev @tlachev]

Power BI Workspace Identity Authentication - https://t.co/XEhLAQWK15 What credentials do you use to refresh your Power BI semantic models from Azure SQL SKUs, such as Azure SQL Database. Probably your credentials or a designated Entra account? Both are not ideal for a variet...

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on December 1st (Migrating Semantic Models to Fabric Direct Lake) - https://t.co/efORFK2sni Atlanta BI fans, please join us in person for our next meeting on Monday, December 1st at 18:30 ET. I'll show you how to Fabric DirectLake semantic ...

[Teo Lachev @tlachev]

SaaS Losers and Winners: Paylocity and Element - https://t.co/FAm0Y5ZOvj “We are sailing to Philadelphia
A world away from the coaly Tyne
Sailing to Philadelphia
To draw the line
The Mason-Dixon line”
“Sailing to Philadelphia”, Mark Knopfler

As I’ve said in the past ...

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on November 3rd (Semantic Link Labs: A Link to the Future) - https://t.co/i6wlEKylow Atlanta BI fans, please join us in person for our next meeting on Monday, November 3rd at 18:30 ET. Jason Romans (Microsoft MVP) will show you how to use S...

[Teo Lachev @tlachev]

Replicating BigQuery to Fabric - https://t.co/MvgfgtG4os A recent engagement required replicating some DW tables from Google BigQuery to a Fabric Lakehouse. We considered the Fabric mirroring feature (back then in private preview, now publicly available) and learned some les...

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on October 9th (Everything You Want to Know About SQL Databases in Fabric) - https://t.co/VHx6pbQE6i Atlanta BI fans, please join us in person for our next meeting on Thursday, October 9th (note that we are meeting on Thursday for this meet...

[Teo Lachev @tlachev]

Prologika Newsletter Fall 2025 - https://t.co/XMDDGJlrFE Like the Ancient Greek philosopher Diogenes, who walked the streets of Athens with a lamp to find one honest man, I have been searching for a convincing Fabric feature for my clients. As Microsoft Fabric evolves, more...

[Teo Lachev @tlachev]

Atlanta Microsoft BI Group Meeting on September 8th (End-to-End Azure DevOps for Data Engineering in Microsoft Fabric) - https://t.co/neoCCGQ31N Atlanta BI fans, please join us in person for our next meeting on Monday, September 8th at 18:30 ET. Jeff Levy (Data Architect @ P...