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| Tietokannan normalisointi× | Entiteetti-relaatiomallinnus× | |
|---|---|---|
| Tieteenala | Tietojärjestelmätiede | Tietojärjestelmätiede |
| Menetelmäperhe | Process / pipeline | Process / pipeline |
| Syntyvuosi≠ | 1970 | 1976 |
| Kehittäjä≠ | Edgar F. Codd | Peter P.-S. Chen |
| Tyyppi≠ | Data organization methodology | Data modeling approach |
| Alkuperäislähde≠ | Codd, E. F. (1970). A relational model of data for large shared data banks. Communications of the ACM, 13(6), 377-387. DOI ↗ | 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 ↗ |
| Rinnakkaisnimet≠ | — | ER modeling, ER diagram |
| Liittyvät | 1 | 1 |
| Tiivistelmä≠ | 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. | 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. |
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