What is DAX?
DAX (Data Analysis Expressions) is a formula language used in Power BI, Analysis Services, and Power Pivot in Excel. It allows you to create calculations and relationships within your data model. DAX is designed to be highly efficient and performant, enabling you to build complex analytical solutions.
Key Concepts
Here are some key concepts related to DAX:
- Functions: DAX provides a wide range of functions for aggregation, filtering, date and time manipulation, and more.
- Tables: DAX operates on tables within your data model.
- Columns: DAX calculations are performed on columns within your tables.
- Measures: Measures are calculations that are dynamically evaluated based on the context of your report.
- Context Transition: Understanding context transition is crucial for writing effective DAX formulas.
Example DAX Formula
SUM(Sales[Amount])
This example calculates the total sales amount from the 'Sales' table.
Learn More
Explore these resources to deepen your understanding of DAX: