مقایسهٔ روشها
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| مدلسازی موجودیت-رابطه× | نرمالسازی پایگاه داده× | |
|---|---|---|
| حوزه | سیستمهای اطلاعاتی | سیستمهای اطلاعاتی |
| خانواده | Process / pipeline | Process / pipeline |
| سال پیدایش≠ | 1976 | 1970 |
| پدیدآور≠ | Peter P.-S. Chen | Edgar F. Codd |
| نوع≠ | Data modeling approach | Data organization methodology |
| منبع بنیادین≠ | Chen, P. P.-S. (1976). The entity-relationship model: Toward a unified view of data. ACM Transactions on Database Systems, 1(1), 9-36. DOI ↗ | Codd, E. F. (1970). A relational model of data for large shared data banks. Communications of the ACM, 13(6), 377-387. DOI ↗ |
| نامهای دیگر≠ | ER modeling, ER diagram | — |
| مرتبط | 1 | 1 |
| خلاصه≠ | Entity-Relationship (ER) modeling is a conceptual approach to database design that represents real-world entities, their attributes, and the relationships between them. Introduced by Peter P.-S. Chen in 1976, ER modeling provides a high-level graphical notation (ER diagrams) that bridges the gap between informal requirements and formal database schemas. | Database normalization is a systematic process for organizing relational database schemas to eliminate redundancy and enforce data integrity. Introduced by Edgar Codd in 1970-1971 as part of the relational database model, it defines a series of normal forms (1NF through BCNF) that progressively eliminate different types of data anomalies. |
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