Posted on Wednesday 27 April 2005
First you collect tons of data through data warehousing.
Then you analyze the data in the data warehouse. How do you analyze it? By letting computers take the data and perform all sorts of calculations ahead of time. They precompute all the values that would otherwise take too long to obtain on the fly.
The resulting bunch of precomputed data is the OLAP cube. It’s a nice, big cube of raw and precomputed data that can be sliced and diced nicely.