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- 1ER ModelEntities
Relationships
Attributes - 2EntitiesOccurs Many Times
Person, Place, Object, Event, Concept - 3AttributesA property or characteristic of an entity
Associated with one entity
Single - Cannot be broken down further
Composite - Can be broken down further (e.g address > Street Name, Postcode)
Multi Valued - Has many values
(e.g area code of phone number 07xxxxxxxx)
Complex -
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- Descripción
- Fichas sobre Sin título, creado por Jack Morley el 07/05/2019.
- Creado por
- Jack Morley
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