This article explains how to correctly measure the dictionary size of a column in a model created in Power BI, Power Pivot, or Analysis Services Tabular.  Read more

This article explains how to improve DAX queries using GENERATE and ROW instead of ADDCOLUMNS when you create table expressions.  Read more

This article describes how the SELECTEDVALUE DAX function simplifies the syntax required in many scenarios where you need to read a single value selected in the filter context.  Read more

SQLBI offers a new introductory DAX video course called Introducing DAX. This article describes which users will benefit more from this learning experience, and how to enroll in the course.  Read more

This article describes how DAX resolves column and measure names in DAX, providing best practices to avoid conflicting names.  Read more

This article describes different techniques to retrieve multiple values from a lookup table in DAX, improving code readability and performance.  Read more

This article describes how table expansion and filter context propagation are important DAX concepts to understand and fix small glitches in DAX expressions.  Read more

This article describes the IN operator in DAX, which simplifies logical conditions checking whether a certain value is included in a list of values or expressions.  Read more

This article describes how to create a virtual relationship in DAX using the TREATAS function, which is more efficient than approaches based on INTERSECT or FILTER.  Read more

This article explains how to use SUMMARIZECOLUMNS, which is a replacement of SUMMARIZE and does not require the use of ADDCOLUMNS to obtain good performance.  Read more