"fifth normal form" meaning in All languages combined

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  "lang_code": "en",
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        "A stage in the normalization of a relational database in which a database is in fourth normal form and every join dependency is implied by the candidate keys."
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          "relational database",
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          "fourth normal form",
          "fourth normal form"
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          "join",
          "join"
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          "dependency",
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          "implied",
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          "candidate key",
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        "(databases) A stage in the normalization of a relational database in which a database is in fourth normal form and every join dependency is implied by the candidate keys."
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        "(databases) A stage in the normalization of a relational database in which a database is in fourth normal form and every join dependency is implied by the candidate keys."
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