> From: Tracy Harms <[email protected]> > > I found an article on multidimensional databases that reminded me of > J, and especially J Grid. > > http://www.topcoder.com/tc?module=Static&d1=tutorials&d2=mddb > "An Introduction to Multidimensional Databases" by dcp (?) > > For the record, I have my doubts that multidimensional databases do > not (formally) fall under relational database theory. My study has > convinced me that the underlying set theory is so general as to apply > far beyond what its limits are commonly assumed to be. Arguments to > the contrary are welcome.
In my personal journey into OLAP and more recent BI, the most consistent is the data warehousing theory. At least, as you point out, it naturally follows from RDBMS theory. http://en.wikipedia.org/wiki/Data_warehouse 1960s - General Mills and Dartmouth College, in a joint research project, develop the terms dimensions and facts ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
