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Codd's 12 rules
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== Further reading == * {{cite book|title=The relational model for database management: Version 2|first=Edgar F.|last=Codd|author-link=Edgar F. Codd|publisher=Addison-Wesley|year=1990|isbn=9780201141924}} * {{cite book|chapter=Codd's Rules|title=Relational Database Design Clearly Explained|series=The Morgan Kaufmann Series in Data Management Systems|first=Jan L.|last=Harrington|edition=2nd|publisher=Morgan Kaufmann|year=2002|isbn=9781558608207}} * {{cite book|chapter=Criteria for Evaluating Relational Database Systems|pages=91 et seq|title=Introduction to Database and Knowledge-Base Systems|volume=28|series=Computer Science|first=S.|last=Krishna|publisher=World Scientific|year=1992|isbn=9789810206192}} [[Category:Data modeling]] [[Category:Database theory]] [[Category:Relational model]]
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