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Why storing data as a string a problem : Storing multiple datums as (in this case comma separated) strings is bad practice because: - First reason: It breaches Codd's second rule (called the "Guaranteed Access Rule") which states that Each and every datum (atomic value) in a relational data base is guaranteed to be logically accessible by resorting to a ...


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Metadata isn't uniquely more important than non-metadata in this context. Rather, his rule just simply wants the reader to realize that "All Information" is inclusive of even the metadata regarding the database itself. This is useful for understanding the structure of the database and the relational model behind it. This is why the Information ...


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None of Codd's rules live in isolation. They all work together to give you that wonderful experience you have today with modern RDBMS, which we all take for granted today. Because before Codd's rules, the world was a horrible horrible place that we "youngsters" didn't know and the "elders" desperately try to forget. Just imagine that ...


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