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560137
Modelo entidad relación
Description
Mind Map on Modelo entidad relación, created by lydaza7 on 18/02/2014.
Mind Map by
lydaza7
, updated more than 1 year ago
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Created by
lydaza7
about 10 years ago
42
0
0
Resource summary
Modelo entidad relación
Entidades
representa una cosa o objeto
Atributos
definen un objeto
Simples
Compuestos
multivaloradas
Derivados
Se dividen en
Relacion
asociación entre entidades
Cardinalidad
Expresa
Numero de asociaciones con otras entidades
1:1
1:N
N:1
N:M
Clave
Permite Identificar
Un conjunto de atributos
Primaria
Foranea
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