In database theory, a conjunctive query is a restricted form of first-order queries. A large part of queries issued on relational databases can be written as conjunctive queries, and large parts of other first-order queries can be written as conjunctive queries. 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. A large part of queries issued on relational databases can be written as conjunctive queries, and large parts of other first-order queries can be written as conjunctive queries. Conjunctive queries also have a number of desirable theoretical properties that larger classes of queries (e.g. , the relational algebra queries) do not share.
- 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.
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- In database theory, a conjunctive query is a restricted form of first-order queries. A large part of queries issued on relational databases can be written as conjunctive queries, and large parts of other first-order queries can be written as conjunctive queries. Conjunctive queries also have a number of desirable theoretical properties that larger classes of queries (e.g. , the relational algebra queries) do not share.
- 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.
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- Conjunctive query
- Konjunktive Anfrage
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