スーパーキー
1. SuperkeyA superkey is defined in the relational model of database organization as a set of attributes of a relation variable for which it holds that in all relations assigned to that variable, there are no two distinct tuples (rows) that have the same values for the attributes in this set. Equivalently a superkey can also be defined as a set of attributes of a relvar upon which all attributes of the relvar are functionally dependent. Note that the set of all attributes is a trivial superkey.
Read “Superkey” on English Wikipedia
Read “スーパーキー” on Japanese Wikipedia
Read “Superkey” on DBpedia
Read “Superkey” on English Wikipedia
Read “スーパーキー” on Japanese Wikipedia
Read “Superkey” on DBpedia
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