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First normal form - Entity-relationship diagram-Unique id...

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First normal form: each cell has only one value Database: a set of data well organized by a framework Database development - User data requirements, collection of data from the user and create a domain accordingly to it. - Conceptual data model—picture model and translate in to a logical data model
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Unformatted text preview: Entity-relationship diagram-Unique id is identified in each database set and represented by # -If there is no one object that can make a unique identifier in the database set it is called as weak -...
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