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Data & Analytics · Foundational

Data Warehouse (DW)

A central repository of integrated, cleaned, historical data from multiple sources, structured for analytics and reporting.

Definition

Bill Inmon defined a data warehouse as subject-oriented, integrated, time-variant and non-volatile. Warehouses are schema-on-write, typically use dimensional models, and run on MPP or cloud engines such as Snowflake, BigQuery, Amazon Redshift, Fabric Warehouse and Databricks SQL.

Exam tip

Inmon's four characteristics: subject-oriented, integrated, time-variant, non-volatile.

Don't confuse it with

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