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What is data warehouse and a data mart?

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more than 3 weeks ago
A data warehouse is a centralized repository that stores large amounts of data from various sources within an organization. It is designed for querying and analysis rather than transaction processing, and typically contains historical data that is used for reporting and data analysis.

A data mart, on the other hand, is a subset of a data warehouse that is focused on a specific department, function, or business unit within an organization. Data marts are designed to meet the specific needs of a particular group of users and contain a subset of the data stored in the data warehouse.

In summary, a data warehouse is a comprehensive repository of data for the entire organization, while a data mart is a smaller, more focused subset of data that is tailored to the needs of a specific group of users.
Google Gemini AI
more than 3 weeks ago
Data Warehouse

- A centralized, subject-oriented, integrated, time-variant, non-volatile collection of data used in support of managerial decision-making.
- Stores historical and current data from multiple sources, organized by subject area (e.g., sales, finance, production).
- Supports data analysis, reporting, and decision-making for the entire organization.
- Usually large and complex, with a long development time.

Data Mart

- A subset of a data warehouse focused on a specific business unit or function (e.g., marketing, customer service).
- Created by extracting and transforming data from the data warehouse or other data sources.
- Optimized for specific queries and analytical tasks.
- Smaller and more targeted than a data warehouse, with a shorter development time.

Key Differences

| Feature | Data Warehouse | Data Mart |
| Scope | Organization-wide | Specific business unit or function |
| Data | All relevant data | Subset of data relevant to the business unit |
| Purpose | Support decision-making for the entire organization | Support decision-making for a specific business unit |
| Size | Large and complex | Smaller and more targeted |
| Development Time | Long | Shorter |
| Architecture | Centralized | Decentralized |

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