1.1. Before Relational Tables

In 1969, Apollo astronauts Neil Armstrong and Buzz Aldrin walked on the moon. That same year Dr. Edgar Frank Codd, Ph.D., developed the theory for relational database systems. Shortly after this development, Codd published “A Relational Model of Data for Large Shared Data Banks” in the Association of Computing Machinery (ACM) journal, Communications of the ACM. Codd's model became the foundation for a prototype; a relational database project within IBM called System/R. Studies were performed at the IBM San Jose Research Center (now the Almaden Research Center) and by 1974 IBM had a running prototype relational database system. This system was based on multitable queries and multiuser access. The method for accessing ...

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