Oracle-L: RE: RE: Difference Between DBMS/RDBMS

From: Hately Mike <Mike.Hately_at_churchill.com>
Date: Tue, 25 Jun 2002 08:23:54 -0800
Message-ID: <F001.00486E8D.20020625082354@fatcity.com>

Heh, I started programming in PL/1 with DL/1 databases. All hierarchical and you had to navigate round the tree using calls like "GN" (get next) and "GU" (get unique). Oh the memories!

Regards,
Mike Hately

__________________Reply Separator____________________


> Author: "Mercadante; Thomas F" <NDATFM_at_labor.state.ny.us>

> Date:       6/25/2002 6:08 AM

>
> Oh you bunch of young whipper-snappers!
>
> A long time ago in a place far-away, we started with simple File
> Systems.
> Then came ISAM file systems.
> These begate DBMS systems. Note there was no 'R' in original DBMS
> systems.
> Some of these were simply an extention to ISAM files that allowed
> (and
> demanded) a more formalized collection of files. In these files,
> there were
> tables and indexes and primary keys. I remember these as
> "Hierarchical
> Database Systems". Still no such thing as foreign keys.
>
> Finally, I believe, DEC came out with the RBMS system which was (I
> know I
> will be corrected on this) one of the first Relational Database
> Managment
> Systems to be made available for large systems. (I have no knowledge
> of IBM
> products - anybody? When did DB2 make itself known?).
>
> On PC's there was also something called RDB I think.
>
> See, its good to be old!
>
> Tom Mercadante
> Oracle Certified Professional
>

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Author: Hately Mike
  INET: Mike.Hately_at_churchill.com

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Received on Tue Jun 25 2002 - 11:23:54 CDT