Validate that a combination of cells are unique in a row in Google Sheets

Question

I'm looking accomplish the following but in a Google sheet.

https://superuser.com/questions/902400/validate-that-a-combination-of-cells-are-unique-in-a-row-in-excel

I have a column of first names and a column of last names. I want to validate that the combination of these two cells in each row is unique.

Answer 1

• use function called UNIQUE:

  =UNIQUE(A1:B)