Data is not sedentary. Once data has been created, it gets moved around to support many different purposes. One type is production data versus test data, and it is likely that there are multiple test environments, for example, to support unit testing, integration testing, new product deliveries, training, and so on. But there may be multiple copies of the “same” data in each of those environments to support different applications, different geographies, different users, different computing environments, and different DBMSs.
