RE: two types of logical

["Dwayne Allison" <Dwayne.Allison@xxxxxxxxxxxxxxxxxxxxxxxx>]

Thanks for clear this up.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of James H. H. Lampert
Sent: Thursday, June 23, 2005 1:44 AM
To: Midrange Systems Technical Discussion
Subject: Re: two types of logical


Dwayne Allison wrote:
>What are the two types of logical?

Actually, there are three:

1. Simple (a single based-on physical)

2. Multi-format (two or more based-on physicals, with separate record
formats in a common key sequence)

3. Joined (a single composite record format tying together related
records from two or more based-on physicals)

And that's not counting whatever types of logical files are unique to SQL.