How to Combine Worksheets Inside an Excel Spreadsheet. There may be times when a business proposal or report you need to write needs data that is kept in two or more separate Excel worksheets.

Learn how to merge multiple CSV files into one Excel sheet. You can combine or join more than one CSV file into one Excel Worksheet.

A complex Excel 2007 workbook could require multiple sheets. By default, Microsoft provides three sheets on each workbook, but you can add as many as you need.