What is the purpose of the Aggr() function in Qlik Sense?

The Aggr() function in Qlik Sense is a powerful tool that allows for advanced aggregation of data based on specified dimensions. Its primary purpose is to return an array of values resulting from the evaluation of an expression, while grouping the results according to specified dimensions.

When you use Aggr(), you can generate a complex dataset that can later be used in other functions or calculations. This is particularly useful in scenarios where you want to obtain aggregated results over multiple dimensions and then analyze those aggregated values further. For instance, if you need to calculate a measure such as average sales per customer, you can use Aggr() to first determine the total sales for each customer and then average those totals.

The ability of Aggr() to return an array of aggregated values makes it suitable for performing nested calculations or for contextually understanding data across multiple dimensions. This characteristic stands out as it allows users to build more intricate expressions that reflect complex business logic.

Understanding the role of the Aggr() function is crucial for any data architect working with Qlik Sense, as it enhances the analytical capabilities of your visualizations and reporting.