Fig. 12.1.19 OLAP technology.A cube is an arrangement of data that allows data to be examined from different
perspectives.
One of the characteristics of data marts is that they are relatively easy and fast to create.
Because of the ease of creation, most organizations build new data marts rather than do
maintenance to existing data marts.
Fig. 12.1.20 shows that data marts are created rather than maintaining older data marts
that need to have a reflection of new requirements.
Chapter 12.1: Operational Analytics