Entity–relationship model
An entity–relationship model (ER model) describes inter-related things of interest in a specific domain of knowledge. An ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between instances of those entity types.
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Chen's notationChen notationConceptual Entity ModelCrow's feet notationCrow's foot notationE-R diagramE-r modelERA modelER diagramER modelEntity-Relationship DiagramEntity-Relationship ModelEntity-Relationship diagramEntity-Relationship diagram (ERD)Entity-Relationship modelEntity-relationshipEntity-relationship-attributeEntity-relationship diagramEntity-relationship diagramsEntity-relationship modelEntity-relationship modelsEntity Relationship DiagramEntity classEntity relationshipEntity relationship attributeEntity relationship diagramEntity relationship diagramsEntity relationship modelEntity relationship modellingEntity relationship modelsEntity–relationship diagramEr diagramEr modelEr modelling
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Entity–relationship model
An entity–relationship model (ER model) describes inter-related things of interest in a specific domain of knowledge. An ER model is composed of entity types (which classify the things of interest) and specifies relationships that can exist between instances of those entity types.
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25بك المحتوى هنا ينقصه الاستشه ...... ان 2.
* العلاقة 3.
* الصفة
@ar
An entity–relationship model ( ...... n of domain-specific ontology.
@en
Das Entity-Relationship-Modell ...... 0er Jahre durch Wong und Katz.
@de
Diagram związków encji lub Dia ...... ma związkami 1:N z nową encją.
@pl
ER模型,全称为实体联系模型或实体关系模型或实体联系模式图( ...... CAM DEFinition Language)和空间建模。
@zh
Em engenharia de software, um ...... acionamentos de uniformização.
@pt
Het entity-relationship-model ...... l, al dan niet gevisualiseerd.
@nl
In informatica, nell'ambito de ...... e non, esistenti sul mercato.
@it
Le modèle entité-association ( ...... ases de données informatiques.
@fr
Un diagrama o modelo entidad-r ...... interrelaciones y propiedades.
@es
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744.201.730
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25بك المحتوى هنا ينقصه الاستشه ...... ان 2.
* العلاقة 3.
* الصفة
@ar
An entity–relationship model ( ...... stances of those entity types.
@en
Das Entity-Relationship-Modell ...... hre Struktur dargestellt wird.
@de
Diagram związków encji lub Dia ...... i, związki te mają dwie cechy:
@pl
ER模型,全称为实体联系模型或实体关系模型或实体联系模式图( ...... CAM DEFinition Language)和空间建模。
@zh
Em engenharia de software, um ...... azenamento em bancos de dados.
@pt
Het entity-relationship-model ...... verbanden tussen de gegevens.
@nl
In informatica, nell'ambito de ...... nio in uno schema concettuale.
@it
Le modèle entité-association ( ...... on des systèmes informatiques.
@fr
Un diagrama o modelo entidad-r ...... interrelaciones y propiedades.
@es
label
Diagram związków encji
@pl
ER-модель данных
@ru
ER模型
@zh
Entity-Relationship-Modell
@de
Entity-relationshipmodel
@nl
Entity–relationship model
@en
Modello E-R
@it
Modelo entidad-relación
@es
Modelo entidade relacionamento
@pt
Modèle entité-association
@fr