# Aggregate

In this document, you will explore how to aggregate in Astera Dataprep.    

1. To aggregate in Astera Dataprep, you can click on the *Transform* option in the toolbar and select *Aggregate* option from the drop-down.

![](/files/yoLieVGKaXwfz23FRs19)

2. Once selected, the *Recipe Configuration – Aggregate* panel will open. 

![](/files/jqI6q9BcyT0VXzLxZ25o)

3. Here, you can configure the *Aggregate* section by selecting column names in the *Name* drop-down, adding any expressions in the *Calculation* column, and selecting an *Aggregate Function* from the drop-down with all the aggregate functions.

![](/files/64Uc6iYhy8oT18xH9k25)

4. Once done, you can click on *Apply* ![](/files/10KTRq7DN4pST0pzbGYQ)

Now, in the grid, you can see that the columns have been grouped by the *EmployeeID* and a *Count* aggregate function has been applied to the *OrderID* field.

![](/files/cNUhzYKfhpaitiydyuOe)

This concludes the document on using *Aggregate* in Astera Dataprep.


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