Excel's Subtotal command allows you to quickly create subtotals in your sorted data, and then collapse the view to to show only the new subtotal rows.

How to Expand and Collapse in Excel 2007. An Excel 2007 spreadsheet may contain very large quantities of data. Individual sections may be unimportant. For example, a sheet that lists your company ...

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.