The Origins of SQL

As you learned in Chapter 1, Dr. E. F. Codd presented the relational database model to the world in 1970. Soon after this landmark moment, organizations such as universities and research laboratories began efforts to develop a language that could be used as the foundation to a database system that supported the relational model. Initial work led to the development of several languages in the mid- to early 1970s, and later efforts resulted in the development of SQL and the SQL-based databases in use today. But just where did SQL originate? How did it evolve? What is its future? For the answers to these questions, we must begin our story at IBM’s Santa Teresa Research Laboratory in San Jose, California.

IBM began a major research ...

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