What is a Data Warehouse?

A data warehouse is a data repository that captures important data about the business.  Modern usage of the term data warehouse includes several key features.

A data warehouse is a database that is:

  • Separate from operational applications
  • Organized by subject and usually in a traditional database schema form
  • Integrated and federated such that inbound data is transformed to meet structured warehouse data standards
  • “Immutable” in that no data is overwritten allowing for “time travel”
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