Data warehouse definition kimball

Data warehouse serves as an information system that contains historical and commutative data from one or several sources. A database is used for recording data.Characteristics of a Data Data Warehouse vs. DatabaseA database is an application-oriented collection of data: Data warehouse is the subject-oriented collection of data
A database is used for recording data: A data warehouse is used for analyzing data
A database is an amalgamation of related data: Data warehouse serves as an information system that contains historical and co
ER modeling techniques are used for designing: Data modeling techniques are used for designing

What is a data warehouse?

The key data warehouse concept allows users to access a unified version of truth for timely business decision-making, reporting, and forecasting

DWH functions like an information system with all the past and commutative data stored from one or more sources

The following are the four characteristics of a Data Warehouse:

What is Kimball data warehouse?

Kimball defines data warehouse as “a copy of transaction data specifically structured for query and analysis”

Kimball’s data warehousing architecture is also known as data warehouse bus ( BUS )

Dimensional modelling focuses on ease of end-user accessibility and provides a high level of performance to the data warehouse

How to decide?

What is the difference between Kimball and Inmon data marts?

Inmon uses data marts as physical separation from enterprise data warehouse and they are built for departmental uses

While in Kimball’s architecture, it is unnecessary to separate the data marts from the dimensional data warehouse

In the dimensional data warehouse of Kimball, analytic systems can access data directly

Ralph Kimball provided a much simpler definition of a data warehouse. As stated in his book, "The Data Warehouse Toolkit": data warehouse is a copy of transaction data specifically structured for query and analysis. This definition provides less insight and depth than Mr. Inmon's, but is no less accurate.

Data warehouse is an enterprise wide collection of data marts. Data warehouse is the foundation for business intelligence. Business Intelligence refers to reporting and analysis of data stored in the warehouse. Kimball lifecycle diagram illustrates the flow of data warehouse implementation.

According to Kimball and Margy Ross's article “Differences of Opinion” " The Enterprise Data warehouse built on the bus architecture ”identifies and enforces the relationship between business process metrics (facts) and descriptive attributes (dimensions) ”.

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