Microsoft Excel comes with a lot of built-in functionality that doesn't restrict you to comparing data in two columns using only one method.

How to Use VLOOKUP to Merge Files. The VLOOKUP spreadsheet function searches an array of cells for a specific value, and returns the value of a cell adjacent to the target data. For example, if a ...

When comparing two columns, you can use it to know which data from the first column is also found in the second column. Here's a step-by-step guide on using VLOOKUP in Excel to compare two columns: ...