This advanced paper explains how SUMMARIZECOLUMNS works internally, providing insight into how to control its behavior in queries and measures following a list of best practices.  Read more

How to implement security in Tabular semantic models considering different requirements, data model design, DAX implementation, and performance.  Read more

Learn how to write DAX queries and how to manipulate tables in DAX measures and calculated columns.  Read more

Learn the internals of Power BI semantic models created by using VertiPaq, DirectQuery over SQL, and DirectQuery for Power BI datasets and Analysis Services.  Read more

Learn how to use the new DAX window functions (INDEX, OFFSET, and WINDOW) to manipulate tables by sorting and partitioning data.  Read more

Visual calculations are a new feature in DAX that aims to simplify the use of DAX for users by introducing calculations at the visual level rather than at the model level.  Read more

Learn how to use calculation groups and how they work internally. The whitepaper is a companion to the related SQLBI+ video course.  Read more