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- Entity_integrity abstract "Entity integrity is a basic constraint of database relational model (abbreviated RM) that refers to the morphology of the primary key but afterwords, the same format is applied to the foreign key and, also to any of simple components of any of two. The relational model states that every relation (or table) must have an identifier, called the primary key (abbreviated PK), in such a way that every row of the same relation be identifiable by its content, that is, by a unique and minimal value. The PK is a not empty set of attributes (or columns). The same format applies to the foreign key (abbreviated FK) because each FK matches a preexistent PK. Each of attributes being part of a PK (or of a FK) must have data values (such as numbers, letters or typographic symbols) but not data marks (also known as NULL marks in SQL world). Morphologically, a composite primary key is in a "steady state": If it is reduced, PK will lose its property of identifying every row of its relation but if it is extended, PK will be redundant. Then, primary key is irreducible and inextendable.".
- Entity_integrity wikiPageID "946798".
- Entity_integrity wikiPageLength "1648".
- Entity_integrity wikiPageOutDegree "17".
- Entity_integrity wikiPageRevisionID "644374008".
- Entity_integrity wikiPageWikiLink Attribute_(computing).
- Entity_integrity wikiPageWikiLink Category:Data_modeling.
- Entity_integrity wikiPageWikiLink Category:Data_quality.
- Entity_integrity wikiPageWikiLink Column.
- Entity_integrity wikiPageWikiLink Data_integrity.
- Entity_integrity wikiPageWikiLink Data_marks.
- Entity_integrity wikiPageWikiLink Database.
- Entity_integrity wikiPageWikiLink Domain_integrity.
- Entity_integrity wikiPageWikiLink Foreign_key.
- Entity_integrity wikiPageWikiLink NULL_marks.
- Entity_integrity wikiPageWikiLink Null_(SQL).
- Entity_integrity wikiPageWikiLink Primary_key.
- Entity_integrity wikiPageWikiLink Referential_integrity.
- Entity_integrity wikiPageWikiLink Relation_(database).
- Entity_integrity wikiPageWikiLink Relational_model.
- Entity_integrity wikiPageWikiLink Row_(database).
- Entity_integrity wikiPageWikiLink SQL.
- Entity_integrity wikiPageWikiLink Table_(database).
- Entity_integrity wikiPageWikiLink Unique_key.
- Entity_integrity wikiPageWikiLinkText "Entity integrity".
- Entity_integrity wikiPageWikiLinkText "entity integrity".
- Entity_integrity hasPhotoCollection Entity_integrity.
- Entity_integrity wikiPageUsesTemplate Template:Database-stub.
- Entity_integrity subject Category:Data_modeling.
- Entity_integrity subject Category:Data_quality.
- Entity_integrity hypernym Constraint.
- Entity_integrity comment "Entity integrity is a basic constraint of database relational model (abbreviated RM) that refers to the morphology of the primary key but afterwords, the same format is applied to the foreign key and, also to any of simple components of any of two. The relational model states that every relation (or table) must have an identifier, called the primary key (abbreviated PK), in such a way that every row of the same relation be identifiable by its content, that is, by a unique and minimal value.".
- Entity_integrity label "Entity integrity".
- Entity_integrity sameAs Entitní_integrita.
- Entity_integrity sameAs 実体完全性.
- Entity_integrity sameAs Integridade_da_relação.
- Entity_integrity sameAs m.03sc8l.
- Entity_integrity sameAs Q3489710.
- Entity_integrity sameAs Q3489710.
- Entity_integrity sameAs 實體完整性.
- Entity_integrity wasDerivedFrom Entity_integrity?oldid=644374008.
- Entity_integrity isPrimaryTopicOf Entity_integrity.