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5 Cards in this Set
- Front
- Back
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What is enity-relationship model (ER) or entity-relationship diagram (ERD)?
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This is a graphical relationship of data structure.
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What is "Entities?"
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Data objects that describe a person, place thing, or event, suchas as employee, company, publisher, author, patient, hospital, and admission.
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What are relationships?
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Associations between entities that are usually described by verb phrases, such as employees, publishes, teaches...
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What are Attributes?
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The elements that provide description and detail about entities and relationships. This may include, name, date, diagnosis, etc.
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What is the first form of Normalization?
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An entity is in first normal form if no repeating groups exist.
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