Power BI DAX: A Simple Introduction to Data Analysis Expressions
By Naomi A. Power BI allows users to create interactive visualizations and reports from their data. One key feature of Power BI is its ability to use DAX (Data Analysis Expressions) to perform calculations and analysis on that data. DAX is a functional language that operates on data stored in tables. It has a syntax similar to Excel formulas, but is more powerful and designed to work with larger datasets. Here are a few examples of how DAX can be used: Sum: The SUM function in DAX adds up the values in a specified column of a table. For example, if you want to find the total sales for a particular product, you can use the SUM function as follows: SUM('Sales'[SalesAmount]) Average: The AVERAGE function in DAX calculates the average of the values in a specified column of a table. For example, if you want to find the average sales for a particular product, you can use the AVERAGE function as follows: AVERAGE('Sales'[SalesAmount]) Filter: The FILTER function in DAX allows ...