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- Candidate_key abstract "In the relational model of databases, a candidate key of a relation is a minimal superkey for that relation; that is, a set of attributes such that the relation does not have two distinct tuples (i.e. rows or records in common database language) with the same values for these attributes (which means that the set of attributes is a superkey) there is no proper subset of these attributes for which (1) holds (which means that the set is minimal).The constituent attributes are called prime attributes. Conversely, an attribute that does not occur in ANY candidate key is called a non-prime attribute.Since a relation contains no duplicate tuples, the set of all its attributes is a superkey if NULL values are not used. It follows that every relation will have at least one candidate key.The candidate keys of a relation tell us all the possible ways we can identify its tuples. As such they are an important concept for the design of database schema.".
- Candidate_key wikiPageExternalLink 2.1.2_Keys.html.
- Candidate_key wikiPageID "336975".
- Candidate_key wikiPageRevisionID "600574075".
- Candidate_key hasPhotoCollection Candidate_key.
- Candidate_key subject Category:Data_modeling.
- Candidate_key comment "In the relational model of databases, a candidate key of a relation is a minimal superkey for that relation; that is, a set of attributes such that the relation does not have two distinct tuples (i.e.".
- Candidate_key label "Candidate key".
- Candidate_key label "Chave candidata".
- Candidate_key label "Chiave primaria".
- Candidate_key label "Clé candidate".
- Candidate_key label "Kandidaatsleutel".
- Candidate_key label "Klucz potencjalny".
- Candidate_key label "Потенциальный ключ".
- Candidate_key label "候補キー".
- Candidate_key sameAs Kandidátní_klíč.
- Candidate_key sameAs Clé_candidate.
- Candidate_key sameAs Chiave_primaria.
- Candidate_key sameAs 候補キー.
- Candidate_key sameAs 후보_키.
- Candidate_key sameAs Kandidaatsleutel.
- Candidate_key sameAs Klucz_potencjalny.
- Candidate_key sameAs Chave_candidata.
- Candidate_key sameAs m.01xmd0.
- Candidate_key sameAs Q2113197.
- Candidate_key sameAs Q2113197.
- Candidate_key wasDerivedFrom Candidate_key?oldid=600574075.
- Candidate_key isPrimaryTopicOf Candidate_key.