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Nick Leeman
2021-10-25 16:51:26 +02:00
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School/Development/Primary Key.md Normal file
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# Primary Key
A Primary key is a [[Constraint]]

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School/Development/SQL Database.md
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## Entity Set
A entity set is a collection of entities that share the same attributes. The entities within the set are distinguishable from each other because the values that the attributes have differ.
A entity set is a collection of entities that share the same attributes. The entities within the set are distinguishable from each other because the values that the attributes have differ. Most of the time this is done via a [[Primary Key]] constraint.