Assertion: unique key | /r/Synonym | candidate keys
Facets:
value: formally
type: MANNER
Source sentences:
text: A relational database table may have one or more available unique keys (formally called candidate keys).
text: In database relational modeling and implementation, a unique key (also known as a candidate key or just a key) is a set of attributes (columns) within a relational database table (also called a relation), such that: