Adding a calculated field in Power BI is done using the DAX formula language. DAX (Data Analysis Expressions) is a formula language used in Power BI to create custom calculations.
To add a calculated field in Power BI, follow these steps:
- Open Power BI Desktop and load your data.
- Go to the “Modeling” tab in the ribbon.
- Click on the “New Column” button in the “Calculations” group.
- In the formula bar, enter the DAX formula for your calculated field.
- Press Enter to create the calculated field.
Here’s an example to illustrate the process:
Let’s say we have a dataset with sales data, and we want to create a calculated field for the total sales amount. The formula for the calculated field would be:
Sales Amount = SUM(Sales[Quantity] * Sales[Unit Price])
In this example, we are multiplying the quantity and unit price columns from the “Sales” table to calculate the sales amount.
Once you have created the calculated field, you can use it in visualizations, measures, and other calculations within Power BI.