Excel Guides

Ensuring Unique Values in a Column in Excel

There are a few ways to ensure unique values in a column in Excel. One way is to use the Data Validation feature. To do this, select the cells in the column that you want to validate, then go to the Data tab on the ribbon and click Data Validation. In the Settings tab of the Data Validation dialog box, choose Custom from the Allow drop-down list. In the Formula box, enter the following formula:

=COUNTIF($A$1:$A$10,A1)=1

This formula will count how many times the value in cell A1 appears in the range A1:A10. If the result is 1, it means that the value is unique. If it's not 1, it means that the value is not unique.

Another way to ensure unique values in a column is to use the Remove Duplicates feature. To do this, select the cells in the column that you want to check for duplicates, then go to the Data tab on the ribbon and click Remove Duplicates. In the Remove Duplicates dialog box, make sure that only the column that you want to check is selected, then click OK. Excel will remove all duplicate values from that column.

Move beyond 

Excel

Get started with Causal today.
Build models effortlessly, connect them directly to your data, and share them with interactive dashboards and beautiful visuals.