Data that are never physically altered once they are added to the store are called periodic data.
Nonvolatile means that, once penetrated into the warehouse, data should not alter. This is logical because the purpose of a warehouse is to allow you to analyze what has occurred.
A data warehouse is a central storehouse of information that can be analyzed to make more educated decisions.
Data flows into data storage from transactional systems, relational databases, and other sources, typically on a regular cadence.
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