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Characteristics of Data Warehousing

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Questions and Answers

What does it mean for a data warehouse to be non-volatile?

Data is only stored temporarily

Data is erased when new data is added

Data is constantly changing

Previous data is not erased when new data is added (correct)

In a subject-oriented data warehouse, what is the primary focus?

Offering information about diverse themes

Focusing on ongoing operations

Providing a comprehensive view of organizational data

Offering information regarding a specific theme or area of focus (correct)

What is the main goal of a subject-oriented data warehouse?

To provide information about all aspects of an organization

To focus on modeling and analysis of data

To use past data for making decisions (correct)

To constantly update with real-time data

How does an integrated data warehouse handle data from multiple sources?

It combines and stores data from multiple sources to provide a unified view Signup and view all the answers

What does it mean when a data warehouse is described as time-variant?

Data collected is identified with a particular time period Signup and view all the answers

How do subject-oriented data warehouses differ from non-subject-oriented ones?

Subject-oriented focus on specific themes, non-subject-oriented on a comprehensive view Signup and view all the answers

What aspect does an integrated data warehouse ensure consistency across?

Naming conventions, measurements, and encoding structures Signup and view all the answers

What is the primary difference between a subject-oriented and non-subject-oriented data warehouse?

Subject-oriented focus on specific themes, non-subject-oriented offer comprehensive views Signup and view all the answers

Why are integrated data warehouses crucial for organizations?

They maintain consistency across various sources of data Signup and view all the answers

In what way does a subject-oriented data warehouse differ from traditional operational systems?

Subject-oriented look back at past events, operational systems focus on real-time activities Signup and view all the answers