This figure illustrates a rollup for a dimension with two hierarchies. In it:

• year: is at the top of the dimension hierarchy

• quarter: is below year

• month: is below quarter

• day: is at the bottom of the dimension hierarchy

In addition, there is a second rollup. In it:

• fis_year: is at the top of the dimension hierarchy

• fis_quarter: is below fis_year

• fis_month: is below fis_quarter

• fis_week: is below fis_month

• dat: is at the bottom of the dimension hierarchy

Therefore, day rolls up both hierarchies.