what is the concept of data modal........
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A data model refers to the logical inter-relationships and data flow between differentdata elements involved in the information world. It also documents the way data is stored and retrieved. ... Data models help represent what data is required and what format is to be used for different business processes.
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A database model shows the logical structure of the database, including the relationships and constraints that determines how data can be stored and accessed. Individual database model are designed based on the rules and concept of whichever broader data model they designers adopt .Most data models can be represented by an accompanying database diagram .
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