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Entity - It is represented by a rectangular shape, Relationship - It is represented by a diamond shape, Attribute - Property inherent to a database entity , Key - Specific attribute used to identify each instance of an entity, Cardinality - Number of occurrences in one entity which are associated (or linked) to the number of occurrences in another, Model - Theoretical description that can help you understand how the system or process works, or how it might work , Datum - A single piece of information , Database - Information stored in a computer in an organized structure so that it can be searched in different ways ,

Entity Relationship Diagram


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