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SQLBI+ updates in April 2025

We released a new course for our SQLBI+ subscribers: Security in Tabular Semantic Models. This course explains how to implement security in Tabular semantic models, considering different requirements, data model design, DAX implementation, and performance. The training is reference material…  Read more

DAX Patterns

Standard time-related calculations

In this pattern we show you how to compute time-related calculations like year-to-date same period last year and percentage growth using a standard calendar The great advantage of working with a standard calendar is that you can rely on several…  More on DAX Patterns


SQLBI Corp.

Optimizing DAX, Second Edition

Optimizing DAX is the state-of-the-art book on optimizing DAX expressions in Power BI and Analysis Services semantic models.
Learn how to locate performance bottlenecks, read the query plan and performance metrics, rewrite the slower part of an expression, and measure the performance improvements. Read more