Question: Discuss why some systems developers believe that a data model is one of the most important part of the statement of information system requirements? Explain

Discuss why some systems developers believe that a data model is one of the most important part of the statement of information system requirements?

Explain in details the meaning of Entity-Relationship Modelling? Identify and briefly explain the main constructs of the Entity-Relationship Modelling?

Explain the different types of entities? Give two example for each entity type?

Explain the different types of cardinality relationship? Give two example for each relationship type?

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