10 Questions
What is the purpose of an independent data mart?
To serve a strategic business unit or a department
What is the main characteristic of a data mart?
It stores limited/relevant data for a specific department
What is the role of an operational data store (ODS)?
To provide a temporary storage for operational data
What does 'nonvolatile' mean in the context of data warehousing?
Data that does not change once it is entered
What is the key characteristic of a dependent data mart?
It is created directly from a data warehouse
What is the key characteristic of an independent data mart?
It is a small data warehouse designed for a strategic business unit or a department
What is the purpose of an operational data store (ODS)?
To serve as an interim area for a data warehouse
What does 'nonvolatile' mean in the context of data warehousing?
Data is persistent and does not change frequently
What is the main characteristic of a dependent data mart?
It is a subset that is created directly from a data warehouse
What is the key characteristic of a data mart?
It stores only limited/relevant data for a specific department
Study Notes
What is a Data Warehouse?
- A physical repository where relational data is specially organized to provide enterprise-wide, cleansed data in a standardized format.
- Designed to support DSS (Decision Support System) functions.
- A collection of integrated, subject-oriented databases.
- Each unit of data is non-volatile, meaning it remains unchanged once entered.
- Each unit of data is relevant to some moment in time.
- Provides a centralized location for storing and managing data from various sources.
- Data is cleansed, transformed, and formatted into a standardized format for easy access and analysis.
- Enables data analysis and reporting across different departments and levels of the organization.
Test your knowledge of data warehousing with this quiz. Learn about the purpose and structure of a data warehouse, which serves as a centralized repository of cleansed and standardized relational data for enterprise-wide use.
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