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Home/Questions/SQL/ER Modeling vs. Dimensional Modeling?

ER Modeling vs. Dimensional Modeling?

SQLmedium0.4 min readPremium

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**Architectural Logic**: ER and dimensional serve different purposes—transactional integrity vs analytical performance. **ER**: Normalized; entities and relationships; OLTP; minimizes redundancy; supports transactional integrity. Many tables; complex joins. **Dimensional**: Star/snowflake; facts and dimensions; OLAP; optimized for analytics. Denormalized; fewer joins; intuitive for business. **Why Both**: ER for operational systems; dimensional for warehouses....

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