I just grabbed the first online reference I could find that would allow
quick access to the point, since my computer books are all still
packed away as I just moved on the 6th of Dec. But the older the
source the better from my point of view. I see you have an IBM email
address. My early training was all based on IBM materials. A great
many programmers seem ignorant of the fact that Dr E. F. Codd created
relational algebra to describe his new theory of Relational databases
while he worked for IBM. Later researches at IBM created SQL to be
used with databases built on Dr Codd's theories. How to design for
relational systems came next.
But the border between the logical design and the physical design is
really pretty thin and is likely going to be heavily slanted toward the
features of the RDBMS in use. Worse this issue has little to do with
the original question.
Received on Sat Dec 18 2004 - 23:36:26 CST
