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bn:22271641n
Noun Concept
Categories: Data modeling, Database management systems
EN
primary key  unique key  alternate key  Composite primary key  k
EN
In relational database management systems, a unique key is a candidate key. Wikipedia
Definitions
Relations
Sources
EN
In relational database management systems, a unique key is a candidate key. Wikipedia
In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation. Wikipedia
Set of attributes that uniquely specify a tuple in a relation Wikidata
Minimal superkey Wikidata
IS A
candidate key
unique identifier
PART OF
relational database
HAS KIND
superkey
foreign key
Persistent Object Identifier
candidate key
surrogate key
+1 relations
OPPOSITE OF
alternate key
Wikipedia
EN
primary key, unique key
Wikidata
EN
primary key, unique key
Wikipedia Redirections
EN
alternate key, Alternate key, Composite primary key, key (computing), Key field, Primary Key, Primary keys, Unique id, unique keys
Wikidata Alias
EN
k, key, key constraint, primary key constraint, uniqueness constraint

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