Six Kinds of Aggregate data per function

• Single Valued Time Period
• Example Total Sales for the Year 2010
• Multi Valued Time Period
• Grouped by Variable in a time period
• Example: Total Sales By Product By Customer for the Year 2018
• Grouped by Transactions in a time period
• Example: Total sales by Year from 2005 to 2015
• Grouped by both Transactions and Variables
• Example: Total sales by product by customer by year for the years 2005 to 2015