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- Relational_model abstract "The relational model for database management is a database model based on first-order predicate logic, first formulated and proposed in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database. The purpose of the relational model is to provide a declarative method for specifying data and queries: users directly state what information the database contains and what information they want from it, and let the database management system software take care of describing data structures for storing the data and retrieval procedures for answering queries.Most relational databases use the SQL data definition and query language; these systems implement what can be regarded as an engineering approximation to the relational model. A table in an SQL database schema corresponds to a predicate variable; the contents of a table to a relation; key constraints, other constraints, and SQL queries correspond to predicates. However, SQL databases, including DB2, deviate from the relational model in many details, and Codd fiercely argued against deviations that compromise the original principles.".
- Relational_model thumbnail Relational_Model.svg?width=300.
- Relational_model wikiPageExternalLink why_binary_relations_beat_tuples.
- Relational_model wikiPageExternalLink wiki?RelationalModel.
- Relational_model wikiPageExternalLink 4164.
- Relational_model wikiPageExternalLink www.thethirdmanifesto.com.
- Relational_model wikiPageID "26220".
- Relational_model wikiPageRevisionID "604164758".
- Relational_model hasPhotoCollection Relational_model.
- Relational_model subject Category:1969_in_computer_science.
- Relational_model subject Category:Articles_with_example_pseudocode.
- Relational_model subject Category:Programming_paradigms.
- Relational_model subject Category:Relational_model.
- Relational_model type Abstraction100002137.
- Relational_model type GrammaticalRelation113796779.
- Relational_model type Inflection113803782.
- Relational_model type LinguisticRelation113797142.
- Relational_model type Paradigm113804375.
- Relational_model type ProgrammingParadigms.
- Relational_model type Relation100031921.
- Relational_model comment "The relational model for database management is a database model based on first-order predicate logic, first formulated and proposed in 1969 by Edgar F. Codd. In the relational model of a database, all data is represented in terms of tuples, grouped into relations. A database organized in terms of the relational model is a relational database.".
- Relational_model label "Model relacyjny".
- Relational_model label "Modello relazionale".
- Relational_model label "Modelo relacional".
- Relational_model label "Modelo relacional".
- Relational_model label "Modèle relationnel".
- Relational_model label "Relational model".
- Relational_model label "Relationeel model".
- Relational_model label "Реляционная модель данных".
- Relational_model label "关系模型".
- Relational_model label "関係モデル".
- Relational_model sameAs Relační_model.
- Relational_model sameAs Modelo_relacional.
- Relational_model sameAs Modèle_relationnel.
- Relational_model sameAs Modello_relazionale.
- Relational_model sameAs 関係モデル.
- Relational_model sameAs 관계형_모델.
- Relational_model sameAs Relationeel_model.
- Relational_model sameAs Model_relacyjny.
- Relational_model sameAs Modelo_relacional.
- Relational_model sameAs m.06jpb.
- Relational_model sameAs Q755662.
- Relational_model sameAs Q755662.
- Relational_model sameAs Relational_model.
- Relational_model wasDerivedFrom Relational_model?oldid=604164758.
- Relational_model depiction Relational_Model.svg.
- Relational_model isPrimaryTopicOf Relational_model.
