How does Dimensional Modeling differ from Entity-Relationship Modeling?
- Dimensional Modeling doesn't use primary keys, while ER Modeling heavily relies on them.
- Dimensional Modeling focuses on optimizing data for reporting and analysis, while ER Modeling emphasizes transactional data and normalization.
- Dimensional Modeling only supports one-to-one relationships, while ER Modeling allows for many-to-many relationships.
- Dimensional Modeling uses circles to represent entities, while ER Modeling uses rectangles.
Dimensional Modeling differs from ER Modeling in its purpose and structure. Dimensional Modeling is tailored for analytical purposes, emphasizing denormalization and simplicity for reporting, whereas ER Modeling focuses on transactional data and normalization for transactional processing.
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