If the two Excel workbooks have the same name, you cannot open them at the same time. For this, either close one of them and then open the other or change the name of one of them.

How to Compare Two Excel Spreadsheets for Duplicate Rows. Excel 2013 can locate duplicate rows as long as one column contains a unique identifier for each record, such as a product ID or account ...

Spreadsheet applications like Excel are great tools businesses can use to process and analyze large amounts of data stored in tabular format. Employee data entry errors like duplicate rows or ...