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Which of the following products was an early implementation of the relational model developed by E.F. Codd of IBM?
Which of the following products was an early implementation of the relational model developed by E.F. Codd of IBM?
The relational model (RM) is an approach to managing data using a structure and language consistent with first-order predicate logic, first described in 1969 by English computer scientist Edgar F. Codd, where all data is represented in terms of tuples, grouped into relations.