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Added wikilinks Tags: Mobile edit Mobile web edit Advanced mobile edit |
Adding local short description: "Relational database theory concept", overriding Wikidata description "in relational database theory, a constraint between two sets of attributes in a relation from a database" |
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{{Short description|Relational database theory concept}}
{{about|a concept in relational database theory|function dependencies in the Haskell programming language|type class}}
{{refimprove|date=October 2012}}
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