What is recorded here?
Codd's RJ909 report developed second and third normal forms by examining dependencies on candidate keys and transitive dependencies of nonprime attributes. Separating dependencies helps identify relations that mix different facts and can suffer update anomalies. The report adds design criteria beyond the 1970 relational-model paper, while acknowledging limitations of removing transitive dependencies.
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Scientific scope
This entry covers the inspected definitions and examples, not every later theorem in the report. Conditions concern all candidate keys. Normalization does not guarantee an optimal application design or remove every dependency without loss.
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People and systems
Edgar F. Codd
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English catalogue narrative
Codd: further normalization through functional dependencies
Codd's RJ909 report developed second and third normal forms by examining dependencies on candidate keys and transitive dependencies of nonprime attributes.
Separating dependencies helps identify relations that mix different facts and can suffer update anomalies. The report adds design criteria beyond the 1970 relational-model paper, while acknowledging limitations of removing transitive dependencies.
Scientific scope
This entry covers the inspected definitions and examples, not every later theorem in the report. Conditions concern all candidate keys. Normalization does not guarantee an optimal application design or remove every dependency without loss.
People and systems
Edgar F. Codd