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Codd, E. F. (1970). "A relational model of data for large shared data banks". Communications of the ACM 13 (6): 377. doi:10.1145/362384.362685. http://www.seas
by mnemotronic 12y ago
Codd, E. F. (1970). "A relational model of data for large shared data banks". Communications of the ACM 13 (6): 377. doi:10.1145/362384.362685.
http://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf http://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf