Codds Rules - CoddsRules Objectives following Database...

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    Codd’s Rules
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    Objectives At the end of this lesson you would be  able to enunciate and explain the  following Codd’s Rules regarding Relational  Database Its acceptance in Oracle9i 
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    Codd’s Rules Dr. E. F. Codd presented twelve (12)  rules that a database must obey if it is  to be considered truly relational These rules came out of Codd’ s  theoretical work on the relational model The Rules were introduced in June  1970
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    Codd's Rules for RDBMS 0.   The foundation rule 1. Information rule 2. Guaranteed access rule 3. Systematic nulls rule 4. Dynamic catalogue rule 5. Comprehensive data sub-language rule
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    1. View updating rule 2. High-level language rule 3. Physical data independence rule 4. Logical data independence rule 5. Integrity independence rule 6. Distribution independence rule 7. Non-subversion rule
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    Zero Rule The rules stem from a single foundation  rule – the “zero rule”: For a system to qualify as a Relational  Database Management System, it must  use its Relational facilities to Manage the  Database
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    The Twelve rules are as follows  …….
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    Rule 1 The Information Rule
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