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Database Systems: Design, Implemen...

12th Edition
Carlos Coronel + 1 other
Publisher: Cengage Learning
ISBN: 9781305627482

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BuyFindarrow_forward

Database Systems: Design, Implemen...

12th Edition
Carlos Coronel + 1 other
Publisher: Cengage Learning
ISBN: 9781305627482
Chapter 13, Problem 6RQ
Textbook Problem
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What is a data warehouse, and what are its main characteristics? How does it differ from a data mart?

Program Plan Intro

Data mart

  • Data mart is the subset of the data warehouse that focuses on the particular subject.
  • It is modified for decision making application and restricted in scope.
  • Data mart optimizes the performance for well-defined users as a single or couple queries.

Explanation of Solution

Data Warehouse:

  • Data warehouse contains the collection of data that is used for decision making and business intelligence.
  • It is a unique kind of database, so it focuses on business intelligence, time variant data, and external data.
  • It is a subject-oriented, integrated, time-variant, and non-updateable data.

Characteristics of data warehouse:

Subject-oriented

  • Subject-oriented is prepared around the important subjects of the enterprise.
  • Major subjects of the data warehouse are students, products, customer, patient, and time.

Integrated:

  • Naming conventions, formats, and encoding structures like characteristics from internal and external system of record from organization are grouped together to define the data warehouse.

Time-variant:

  • Data include a time dimension that is used to study trends and changes in the data warehouse...

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