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Questions and Answers
What is the purpose of an independent data mart?
What is the purpose of an independent data mart?
- To store summarized and normalized data
- To serve a strategic business unit or a department (correct)
- To integrate data from different sources in the organization
- To store data temporarily for real-time analysis
What is the main characteristic of a data mart?
What is the main characteristic of a data mart?
- It is designed for real-time data analysis
- It stores limited/relevant data for a specific department (correct)
- It stores all available data in the organization
- It is used as an interim area for a data warehouse
What is the role of an operational data store (ODS)?
What is the role of an operational data store (ODS)?
- To provide a temporary storage for operational data (correct)
- To serve as an interim area for a data warehouse
- To store historical data for long-term analysis
- To integrate data from different data marts
What does 'nonvolatile' mean in the context of data warehousing?
What does 'nonvolatile' mean in the context of data warehousing?
What is the key characteristic of a dependent data mart?
What is the key characteristic of a dependent data mart?
What is the key characteristic of an independent data mart?
What is the key characteristic of an independent data mart?
What is the purpose of an operational data store (ODS)?
What is the purpose of an operational data store (ODS)?
What does 'nonvolatile' mean in the context of data warehousing?
What does 'nonvolatile' mean in the context of data warehousing?
What is the main characteristic of a dependent data mart?
What is the main characteristic of a dependent data mart?
What is the key characteristic of a data mart?
What is the key characteristic of a data mart?
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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.
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