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SQLBI+ updates in May 2024

In 2023, we released the first draft of the Window functions in DAX whitepaper as part of SQLBI+. Since then, we have released a few updates and are now glad to announce the availability of the related 3-hour video course…  Read more

DAX Patterns

New and returning customers

The New and returning customers pattern helps in understanding how many customers in a period are new returning lost or recovered There are several variations to this pattern each with different performance and results depending on the requirements Moreover it…  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