An introduction to database systems: vol. I (4th ed.)
An introduction to database systems: vol. I (4th ed.)
The relational model for database management: version 2
The relational model for database management: version 2
ACM SIGMOD Record
A first course in database systems
A first course in database systems
A relational model of data for large shared data banks
Communications of the ACM
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A relational database is one that is built and operated in accordance with the Relational Model of Data proposed by E. F. Codd (1970). This model has now gained wide acceptance and has engendered a great deal of additional study covering numerous aspects of database theory and practice. The Third Manifesto, by Hugh Darwen and C. J. Date (1995) is a modern reaffirmation and in certain respects a clarification of the Relational Model.