What does "superkey" mean?

Any set of attributes of a relation variable (relvar) that serve to identify a single tuple or row, no other tuple having the same value for every attribute in the set.

Superkey

noun

noun ·Rare ·Advanced level

Definitions

Noun

1
Any set of attributes of a relation variable (relvar) that serve to identify a single tuple or row, no other tuple having the same value for every attribute in the set.

Etymology

From super- + key.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.