Abstract :
One of the most important research areas in computer science in the early 1970s was the development of systems and languages for handling what computer scientists call persistent data. This term denotes data that remains in a computer system indefinitely, until it is explicitly deleted. Systems for managing persistent data were spreading quickly in the business world. A database management language proposed by the Codasyl Data Base Task Group (DBTG) was receiving a lot of attention. In this paper, the early history of SQL is discussed.
