What does DAX stand for in Power BI?

DAX stands for Data Analysis Expressions, which is a powerful formula language used in Power BI, SQL Server Analysis Services (SSAS), and Microsoft Excel to define custom calculations and queries on data models. It is designed to work with relational data and enables users to create measures, calculated columns, and perform time-based analysis, among other functions.

DAX is particularly effective for handling data that has complex relationships, enabling users to develop sophisticated analytical queries and derive insights through calculations at various levels of granularity. The ability to create measures and calculated fields enhances the analytical capabilities of Power BI, making it a vital skill for anyone looking to leverage the platform effectively.

The other terms presented do not accurately represent what DAX stands for. For instance, "Data Aggregation Expressions" and "Dynamic Analysis Expressions" do not exist as standardized terms in the Power BI toolkit. While "Data Analysis Extensions" might sound plausible, it fails to capture the essence of what DAX is primarily used for in the context of Power BI analytics.