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Third normal form

Third normal form (3NF) is a level of database normalization defined by English computer scientist Edgar F. Codd. A relation (or table, in SQL) is in third normal form if it is in second normal form and also lacks non-key dependencies, meaning that no non-prime attribute is functionally dependent on (that is, contains a fact about) any other non-prime…

Applications, Computation & Considerations for use in reporting environments

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Computation

ProjectionsJoinFunctional dependencyPolynomial timeCanonical cover
5 related topics

Considerations for use in reporting environments

AnalyticsDimensional modelingHadoopData science
4 related topics

Definition of third normal form

RelationSuperkeySet difference
3 related topics

"Nothing but the key"

Oath to tell the truthNecessary but not sufficientChristopher J. Date
3 related topics

Topics to explore

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Overview

Definition of third normal form

"Nothing but the key"

Computation

Considerations for use in reporting environments

Advanced semantic analysis

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Map overview Semantic statistics

Third normal form

Nodes32
Edges31
Triples17
Avg. degree1.94
Density0.0625
Components1

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Third normal form

Top relations

related to External links · 10
Third normal form → About, An Introduction, Database Normalization, Fred CoulsonDescription, Litt's Tips, MicrosoftThird Normal Form, Mike Chapple, Mike Hillyer, NormalizationDatabase Normalization Basics, Simple Examples
related to Computation · 5
Third normal form → Further, R1, Rn, To, What

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Important terminology

3nf key relation attribute codd form normal definition 2nf dependency dependent candidate attributes non-prime third must would functional prime non-key

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
trend linesinstance ofand dashboards were often facilitated by a different type of data model that provided pre-calculated analysis0.80text
period-to-date calculationsinstance ofand dashboards were often facilitated by a different type of data model that provided pre-calculated analysis0.80text
Third normal formrelated to ComputationR10.60section
Third normal formrelated to ComputationRn0.60section
Third normal formrelated to ComputationFurther0.60section
Third normal formrelated to ComputationWhat0.60section
Third normal formrelated to ComputationTo0.60section
Third normal formrelated to External linksLitt's Tips0.60section
Third normal formrelated to External linksNormalizationDatabase Normalization Basics0.60section
Third normal formrelated to External linksMike Chapple0.60section
Third normal formrelated to External linksAbout0.60section
Third normal formrelated to External linksAn Introduction0.60section

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