You can filter data in Excel based on either certain parameters in columns or over the whole sheet, and you can later unfilter the sheet.

Excel spreadsheets can grow unwieldy as they get larger and larger in size. If your company is working with a large list in an Excel spreadsheet, take advantage of the program's built-in filter ...

Remove subtotals and turn off outlining before you apply Remove Duplicates. If you're new to Microsoft Excel 2007, take time to study the Remove Duplicates feature, as it did not appear in Excel 2003.