When you mention “data warehouse” to someone not acquainted with the term, the first image that springs to their minds is usually something like the one above. When in fact, it actually looks a little more like this: A data warehouse is, on the highest level, a central repository of data.

In part one of our History of BI series, we looked at the origins of BI, the way it developed over the 1960’s and 70’s, and the key technologies that emerged within these era’s. The article began by mapping the way data storage changed from hierarchical database management systems (DBMS), like