What is the difference between summary and aggregate data?

This is a simple data mart question. What is summary data? Most books and white papers state that the star schema contains aggregated and summarized data. I understand aggregated data (i.e., monthly sales), but what is summarized? Is it a subset of the detail data or is there some type of transformation to the data to make it summarized?

To continue, please log in or register.

Free Site Registration

Twitter
Facebook
LinkedIn
Please note you must now log in with your email address and password.