This 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
• day: is at the bottom of the dimension hierarchy

Therefore, day rolls up both hierarchies.