Re: Pre-relational, post-relational, 1968 CODASYL "Survey of Data Base Systems"
Date: Sun, 25 Apr 2004 16:52:22 -0500
"Ken North" <knorth2_at_deletethis.yahoo.com> wrote in message
> It's always amusing to read a description of some DBMSs as
> or to read that E.F. Codd's 1970 paper about the relational model was the
> genesis of database technology.
> "A Relational Model of Data for Large Shared Data Banks", E. F. Codd
> (Communications of the ACM, Vol. 13, No. 6, June 1970)
> When cleaning out some old files, I found a folder with vintage-1968
> related to the CODASYL Data Base Task Group. One of the documents is a
> of Data Base Systems" dated 3 September 1968. It lists 51 database
> identifies another 22 systems not included in the survey.
> The systems in that survey are predecessors of the CODASYL database
> Codd's relational model, and SQL. Three of those systems have evolved in
> years since the survey.
> IBM IMS is still in use. Dick Pick evolved GIM-I into the Pick database
> The Mass General/BBN system evolved and is still available today as MUMPS,
Sweet! I've been tracking down pre-SQL database information and this is
most helpful. I haven't tracked ADABAS to its origins, but might that be
somewhere in the pre-relational? I, too, laugh at the "post-relational"
claims, often used with MUMPS or PICK products (even by companies like IBM
who ought to know better, eh?).
--dawn Received on Sun Apr 25 2004 - 23:52:22 CEST