Database design

linneamd
Flashcards by linneamd, updated more than 1 year ago
linneamd
Created by linneamd over 4 years ago
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1 Database Flashcards on Database design, created by linneamd on 03/14/2016.
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Question Answer
What is an entity type? Represents a physical or abstract concept with some sort of identity and some descriptive features.
What is an attribute? The descriptive features of entities are called attributes.
What is an entity? Corresponds to a set of entities having the same set of attributes.
What is a relationship type? Represents a connection between two or more entity types.
What is a key? An attribute that has unique values for every instance of an entity type.
What is a weak entity type? Those that are meaningless without an owner entity type.
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