Concepts
Relational Model
Model
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The relational model is an approach to managing data using a structure and language consistent with first order predicate logic: all data lives in relations, tables of rows and columns, and every question about it is a logical expression over them. It was first described in 1969 by the English computer scientist Edgar F. Codd, whose 1970 paper A Relational Model of Data for Large Shared Data Banks became the foundation of the relational database industry and of the SQL language.
Facts
Origin YearFirst described in 1969; the landmark public paper is Codd's 1970 A Relational Model of Data for Large Shared Data Banks. Core PrincipleKeep all data in tables of rows and columns and ask every question in logic, so that what is stored is independent of how it is stored. 1 Cross-Tradition Connections
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1. Wikipedia: Relational Model
Wikimedia FoundationOpening and History sectionsQuote, Opening and History sections
The relational model (RM) is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by English computer scientist Edgar F. Codd
1. Wikipedia: Relational Model
Wikimedia FoundationOpening sectionQuote, Opening section
first described in 1969 by English computer scientist Edgar F. Codd
1. Wikipedia: Relational Model
Wikimedia FoundationInvented By: Edgar F. Codd, History sectionQuote, Invented By: Edgar F. Codd, History section
The relational model was developed by Edgar F. Codd as a general model of data, and subsequently promoted by Chris Date and Hugh Darwen among others.
Wikipedia: SQL
Wikimedia FoundationInfluenced: SQL, History sectionQuote, Influenced: SQL, History section
SQL was initially developed at IBM by Donald D. Chamberlin and Raymond F. Boyce after learning about the relational model from Edgar F. Codd in the early 1970s.
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