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Microsoft Power BI Dashboards Step by Step, First Edition by Errin O’Connor

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5 Use DAX in Power BI

Data Analysis Expressions (DAX) is a collection of functions, operators, and constants for handling basic data calculations to better analyze data and solve business problems. With DAX, you can build or apply functions that use existing data within Power BI. For example, suppose you have a data set in a Power BI report that consists of information about product sales, and you want to add a column that calculates sales growth as a percentage. You could easily achieve this using DAX.

In this chapter, you will learn how to use DAX in Power BI. First, you’ll learn about calculated columns and measures. Next, you’ll explore ...

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