9. The method for implementing aggregation combination using rollup depth lists for optimizing database query processing as recited in claim 7 includes defining a rollup set starting with a simple rollup of all cube elements.
9. The method for implementing aggregation combination using rollup depth lists for optimizing database query processing as recited in claim 7 includes defining a rollup set starting with a simple rollup of all cube elements. 10. The method for implementing aggregation combination using rollup depth lists for optimizing database query processing as recited in claim 9 further includes defining round robin rollups through cube elements with each cube element at a beginning of a rollup.