Group or ungroup data in a PivotTable. Grouping data in a PivotTable can help you show a subset of data to analyze. For example, you may want to group an unwieldy list date and time fields in the PivotTable into quarters and months. Need more help? You can always ask an expert in the Excel Tech Community or get support in Communities. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.