About: Conjunctive query

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In database theory, a conjunctive query is a restricted form of first-order queries using the logical conjunction operator. Many first-order queries can be written as conjunctive queries. In particular, a large part of queries issued on relational databases can be expressed in this way. Conjunctive queries also have a number of desirable theoretical properties that larger classes of queries (e.g., the relational algebra queries) do not share.

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  • In database theory, a conjunctive query is a restricted form of first-order queries using the logical conjunction operator. Many first-order queries can be written as conjunctive queries. In particular, a large part of queries issued on relational databases can be expressed in this way. Conjunctive queries also have a number of desirable theoretical properties that larger classes of queries (e.g., the relational algebra queries) do not share. (en)
  • Konjunktive Anfragen sind eine Einschränkung von Anfragen der Prädikatenlogik und haben eine Reihe an wünschenswerten Eigenschaften, die in der Datenbanktheorie intensiv untersucht worden sind. Viele Anfragen an relationale Datenbanken – und damit auch viele SQL-Anfragen – sind konjunktive Anfragen. (de)
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  • medic (en)
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  • June 2020 (en)
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  • In database theory, a conjunctive query is a restricted form of first-order queries using the logical conjunction operator. Many first-order queries can be written as conjunctive queries. In particular, a large part of queries issued on relational databases can be expressed in this way. Conjunctive queries also have a number of desirable theoretical properties that larger classes of queries (e.g., the relational algebra queries) do not share. (en)
  • Konjunktive Anfragen sind eine Einschränkung von Anfragen der Prädikatenlogik und haben eine Reihe an wünschenswerten Eigenschaften, die in der Datenbanktheorie intensiv untersucht worden sind. Viele Anfragen an relationale Datenbanken – und damit auch viele SQL-Anfragen – sind konjunktive Anfragen. (de)
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  • Konjunktive Anfrage (de)
  • Conjunctive query (en)
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