What Is a Date Roll-up Dimension?

A date roll-up dimension is a time-based dynamic dimension that is created using data from another, more focused time-based dimension. For example, data from a Ship Date dimension (YYYYMMDD) can be rolled up to create a MonthYear dimension (MMYYYY), which contains the combined totals for all the days in each month, and a Year dimension, which rolls up the data for the entire year.

Sample date roll-up dimensions.