How to Use the GroupBy Function in Power Apps

Introduction

Managing and organizing data efficiently is an essential part of building applications in Power Apps. One of the most useful functions for this purpose is GroupBy(), which allows developers to organize records into logical groups based on one or more columns. Whether you're building reports, dashboards, or hierarchical galleries, the GroupBy() function helps present data in a more structured and meaningful way.

What is the GroupBy() Function?

The GroupBy() function groups records from a table based on the values in one or more columns. Instead of returning a flat list of records, it creates a new table where each row represents a unique group. Each group contains a nested table with all related records.

Syntax

GroupBy(
    Table,
    ColumnName1,
    GroupColumnName
)

Parameters

Table – The data source or collection to group.
ColumnName1 – The column used to group the records.
GroupColumnName – The name of the new column that stores the grouped records.

Example: Group Employees by Department

Consider the following employee data:

Employee	Department	Salary
Emp101	HR	50,000
Emp102	IT	70,000
Emp103	HR	55,000
Emp104	IT	75,000
Emp105	Finance	60,000

To group employees by department, use the following formula:

ClearCollect(
    colGroupedEmployees,
    GroupBy(
        Employees,
        Department,
        EmployeeData
    )
)

The resulting collection contains one record for each department, while the EmployeeData column stores a nested table containing all employees belonging to that department.

Department	EmployeeData
HR	Emp101,Emp103
IT	Emp102, Emp104
Finance	Emp105

Displaying Grouped Data in Galleries

A common use case for GroupBy() is creating hierarchical galleries.

Set the Items property of the parent gallery to:

colGroupedEmployees

Display the department name using:

ThisItem.Department

Inside the parent gallery, insert a nested gallery and set its Items property to:

ThisItem.EmployeeData

Then display the employee name using:

ThisItem.Employee

The result is a clean parent-child layout where each department expands to show its employees.

Calculating Total Salary for Each Department

You can combine GroupBy() with AddColumns() and Sum() to create summary reports.

AddColumns(
    GroupBy(
        Employees,
        Department,
        EmployeeData
    ),
    TotalSalary,
    Sum(EmployeeData, Salary)
)

This formula adds a TotalSalary column containing the sum of salaries for each department.

Department	Total Salary
HR	105,000
IT	145,000
Finance	60,000

Counting Records in Each Group

To count the number of employees in each department:

AddColumns(
    GroupBy(
        Employees,
        Department,
        EmployeeData
    ),
    EmployeeCount,
    CountRows(EmployeeData)
)

The output provides the total number of employees in every department.

Ungrouping Data

If you need to convert grouped data back into its original flat structure, use the Ungroup() function.

Ungroup(
    colGroupedEmployees,
    EmployeeData
)

This restores the original list of records.

Grouping by Multiple Columns

Power Apps also allows grouping by multiple columns. For example:

GroupBy(
    Sales,
    Region,
    Product,
    SalesData
)

This groups records based on the combination of Region and Product, making it useful for creating more detailed reports and summaries.

Common Use Cases

The GroupBy() function is especially useful in the following scenarios:

Creating expandable or collapsible galleries.
Grouping orders by customer.
Organizing employees by department.
Displaying category-wise reports.
Calculating totals, averages, minimums, maximums, and counts.
Building dashboards with summarized data.

Best Practices

Use meaningful names for the grouped table, such as EmployeeData or SalesRecords, to improve readability.
Combine GroupBy() with functions like AddColumns(), Sum(), Average(), CountRows(), Min(), and Max() for powerful data analysis.
Be aware of delegation limits when working with large data sources such as SharePoint or SQL Server, as not all grouping operations can be processed server-side.
Test performance when grouping large datasets to ensure a responsive user experience.

Conclusion

The GroupBy() function is one of the most powerful data transformation functions available in Power Apps. It enables developers to organize related records into nested tables, making it easier to build hierarchical galleries, generate summary reports, and perform advanced calculations.

Whether you're building employee directories, sales dashboards, customer reports, or inventory management applications, mastering GroupBy() will help you create cleaner, more efficient, and scalable Power Apps solutions.