"superkey" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "super",
        "3": "key"
      },
      "expansion": "super- + key",
      "name": "prefix"
    }
  ],
  "etymology_text": "From super- + key.",
  "forms": [
    {
      "form": "superkeys",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "superkey (plural superkeys)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with super-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Databases",
          "orig": "en:Databases",
          "parents": [
            "Computing",
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "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."
      ],
      "id": "en-superkey-en-noun-4SgsQZgM",
      "links": [
        [
          "database",
          "database"
        ],
        [
          "attribute",
          "attribute"
        ],
        [
          "relvar",
          "relvar"
        ],
        [
          "tuple",
          "tuple"
        ]
      ],
      "raw_glosses": [
        "(databases) 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."
      ],
      "topics": [
        "computing",
        "databases",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "superkey"
      ]
    }
  ],
  "word": "superkey"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "super",
        "3": "key"
      },
      "expansion": "super- + key",
      "name": "prefix"
    }
  ],
  "etymology_text": "From super- + key.",
  "forms": [
    {
      "form": "superkeys",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "superkey (plural superkeys)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with super-",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Databases"
      ],
      "glosses": [
        "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."
      ],
      "links": [
        [
          "database",
          "database"
        ],
        [
          "attribute",
          "attribute"
        ],
        [
          "relvar",
          "relvar"
        ],
        [
          "tuple",
          "tuple"
        ]
      ],
      "raw_glosses": [
        "(databases) 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."
      ],
      "topics": [
        "computing",
        "databases",
        "engineering",
        "mathematics",
        "natural-sciences",
        "physical-sciences",
        "sciences"
      ],
      "wikipedia": [
        "superkey"
      ]
    }
  ],
  "word": "superkey"
}