In this talk, we will present some techniques for
supporting compression and accuracy in multidimensional OLAP data cubes. The
proposed techniques can be efficiently used in Quality-of-Answer-based OLAP
tools, where OLAP users/applications and Data Warehouse servers are allowed to
mediate on the compression and accuracy of (approximate) answers. Two techniques
are presented: LCS-Hist (EDBT’09), which is able to deal with high-dimensional
data cubes, and D-Syn (SSDBM’06), which exploits an analytical interpretation of
data cubes for making the intrinsic data cube compression more flexible.