Codd's 12 Rules for RDBMS


  • The Information rule
  • The Guaranteed Access rule
  • The Systematic Treatment of Null Values rule
  • The Dynamic Online Catalog Based on the Relational Model rule
  • The Comprehensive Data Sublanguage rule
  • The View Updating rule
  • The High-level Insert, Update, and Delete rule
  • The Physical Data Independence rule
  • The Logical Data Independence rule
  • The Integrity Independence rule
  • The Distribution Independence rule
  • The No subversion rule

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