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A database model is a set of definitions describing how real-world data is conceptually represented as information in the computer
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The relational model - database collects related information in a set of tables.
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A table either contains the attributes of an entity or the relationships between entities
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In the example problem, people and phone numbers are entities;
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Title, uid etc. are attributes of the person entity; type is attribute of phone number entity
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pid is used to set up relationships between entities
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