This operator, proposed in Pedersen, Jensen, & Dyreson (2001), computes the SQL aggregate function on a MAD, which is grouped by a set of dimension categories, by first applying the aggregate formation operator to the MAD with the given categories and the given function. Note that the categories not in the group-by clause are in the categories of their dimensions. The dimensions not in the group-by clause are then projected out.

Multidimensional Databases(c) Problems and Solutions
Multidimensional Databases: Problems and Solutions
ISBN: 1591400538
EAN: 2147483647
Year: 2003
Pages: 150

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net