Why Combine Dynamic Array Functions

The FILTER function returns all records that meet a condition. In many real-world cases, the result needs further refinement. For example, you may want to:

• Remove duplicate values;
• Sort the returned list;
• Create cleaner summaries from raw data.

This is where UNIQUE and SORT become useful. When combined with FILTER, they allow Excel to return a clean and organized dynamic result.

The UNIQUE Function

The UNIQUE function returns distinct values from a range. If the source data contains repeated values, UNIQUE removes duplicates.

=UNIQUE(array)

array: the range containing the values.

The SORT Function

The SORT function sorts a range or spilled result.

=SORT(array)

array: the range or dynamic result to sort.

Example Returning a Sorted Unique List of Customers

Assume a worksheet contains the following table.

The goal is to return a list of customer names without duplicates and sorted alphabetically.

=UNIQUE(B2:B7)

This returns each customer name once.

=SORT(UNIQUE(B2:B7))

This returns a distinct list of customers in sorted order.

Combining FILTER with UNIQUE and SORT

Assume the worksheet contains a product table with Product ID, Product Name, Category.

The category is entered in cell F2. The goal is to return a sorted list of unique product names that belong to the selected category.

=SORT(UNIQUE(FILTER(B2:B11; C2:C11=F2)))

• The FILTER function runs first and returns all product names that match the category;
• UNIQUE removes duplicates from that filtered list;
• SORT arranges the final result in ascending order.

This creates a dynamic list that updates automatically when the selected category changes.

Task

Scenario

A worksheet contains a sales table with Sales ID, Customer, City, Amount, Region. A region is entered in an input cell. Your goal is to return a sorted list of unique cities from that region.

Task Instructions

• Filter the rows based on Region;
• Return only the City values;
• Remove duplicate city names;
• Sort the result alphabetically.