Excel UNIQUE Formula

Removes duplicate rows or columns from an array.

Syntax

Formula structure

Source: Quadratic docs
=UNIQUE(array, [by_column], [exactly_once])
array
Required: Yes

Required argument used by the UNIQUE formula.

[by_column]
Required: No

Optional argument used by the UNIQUE formula.

[exactly_once]
Required: No

Optional argument used by the UNIQUE formula.

Examples for the excel unique formula

Copy these examples into a spreadsheet and adjust the ranges for your own data.

UNIQUE syntax pattern

=UNIQUE(array, [by_column], [exactly_once])

Use this UNIQUE pattern as the starting point for your spreadsheet formula.

UNIQUE in a worksheet

=UNIQUE(array, [by_column], [exactly_once])

Removes duplicate rows or columns from an array.

When to use UNIQUE

Use UNIQUE when you need to remove duplicate rows or columns from an array.

  • Filter, sort, deduplicate, and combine spreadsheet arrays.
  • Build dynamic formula outputs from ranges.

How UNIQUE works in Quadratic

In Quadratic, UNIQUE follows the syntax UNIQUE(array, [by_column], [exactly_once]). The function works inside Quadratic formulas and can be combined with spreadsheet ranges, tables, and other formulas.

Common UNIQUE mistakes

Most UNIQUE issues come from mismatched argument types, ranges that do not cover the intended data, or optional parameters being omitted when the default behavior is not what you expected.

  • Check each required parameter before copying the formula across a sheet.
  • Confirm that ranges line up with the rows or columns you intend to analyze.
  • Use Quadratic AI to explain or debug the formula when the result looks wrong.

Related formulas

UNIQUE formula FAQ

What does the excel unique formula do?

UNIQUE removes duplicate rows or columns from an array.

What is the syntax for UNIQUE?

The syntax is UNIQUE(array, [by_column], [exactly_once]). Required and optional parameters are listed at the top of this guide.

Can Quadratic AI help with UNIQUE?

Yes. Quadratic AI can write a UNIQUE formula, explain existing formula logic, or help debug broken references and unexpected results.

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Spreadsheet formulas are powerful, but they get painful fast. A UNIQUE formula can start simple, then turn into logic that is hard to understand, easy to break, and difficult to share with the rest of your team.

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Why formulas slow teams down

  • Long formulas become hard to read, understand, and trust.
  • Formula logic breaks when rows, columns, or assumptions change.
  • Manual updates make dashboards and reports fragile over time.
  • Complex formulas are difficult to explain, review, and share with teammates.
  • Advanced analysis quickly outgrows formula-only workflows.