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Codd's twelve rules[1] are a set of thirteen rules (numbered zero to twelve) proposed by Edgar F. Codd, a pioneer of the relational model for databases, designed to define what is required from a database management system in order for it to be considered relational, i.e., a relational database management system (RDBMS).[2][3] They are sometimes referred to as "Codd's Twelve Commandments".[4]
- ^ "Codd's 12 Rules". RelDB.org. 2019-06-30. Retrieved August 14, 2020.
- ^ Codd, Edgar Frank (14 October 1985), "Is Your DBMS Really Relational?", Computerworld.
- ^ Codd, Edgar Frank (21 October 1985), "Does Your DBMS Run By the Rules", Computerworld.
- ^ Cowley, Stewart (2017). Man vs Big Data: Everyday data explained. ISBN 9781781317563. Retrieved 22 January 2022.