http://en.wikipedia.org/wiki/D_(data_language_specification) http://en.wikipedia.org/wiki/D_(data_language_specification) Chris Date is worth reading for his i

http://en.wikipedia.org/wiki/D_(data_language_specification) http://en.wikipedia.org/wiki/D_(data_language_specification) Chris Date is worth reading for his ideas on what a good language for relational algebra should be like and why SQL isn't that language.