Fig. 8.1.21 Online transaction processing, OLTP.The online database environment opened up computing to parts of the business where
never before had any interaction been possible. Soon, there were applications
everywhere. And in short order, the applications spawned what was known as the spider's
web environment.
With the spider's web environment came the need for integrity of data. Soon, the concept
of the data warehouse arose.
Fig. 8.1.22 shows the advent of the data warehouse.
Chapter 8.1: A Brief History of Data Architecture