Discussion
Which of the following products was an early implementation of the relational model developed by E.F. Codd of IBM?
Answer: B
Correct answer: DB2
DB2 was IBM’s commercial relational product, descended from the System R research prototype built to test E. F. Codd’s 1970 relational model. IDMS implemented the older CODASYL network model, and dBase-II and R:base were PC products of the 1980s.
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