What is a "data sublanguage"
Date: Tue, 18 Dec 2007 16:19:57 GMT
It's time for me to ask another dumb question.
The term "data sublanguage" appears in Codd's 1970 paper. I kind of glossed over it when I first read it, figuring that my intuitive grasp was close enough. Now I'm wondering whether I really know what "data sublanguage" means, at all.
What is a "data sublanguage"? What is the difference between a "sublanguage" and a "language"? Can a programming language embed a data sublanguage as a subset of the syntax and semantics of the programming language? Does the data sublanguage Codd was referring to span all the syntax and semantics of the relational data model?
Did SQL take the place of the data sublanguage Codd was suggesting should be built? Have Date & Darwen or others created a relational data sublanguage?Received on Tue Dec 18 2007 - 17:19:57 CET