Re: CODASYL-like databases
From: -CELKO- <jcelko212_at_earthlink.net>
Date: Tue, 1 Apr 2008 06:20:17 -0700 (PDT)
Message-ID: <79123b5a-9491-496f-8a30-a7abf8c99472@8g2000hsu.googlegroups.com>
Date: Tue, 1 Apr 2008 06:20:17 -0700 (PDT)
Message-ID: <79123b5a-9491-496f-8a30-a7abf8c99472@8g2000hsu.googlegroups.com>
The last standard for the network model was NDL; I still have a copy
of the document. The real problems were (1) They could not be
optimized since they had fixed access paths to the data (2) They were
procedural and not declarative, so the programmer did all the work.
(3) Everyone had a different language instead of a Standard like SQL
to use (NDL came too late).
Most oft he business data in the world is still in IMS today. Received on Tue Apr 01 2008 - 08:20:17 CDT