RE: SQL subquery? sub-something?

Dan,

Sounds like the SQL view would be the easiest, then create any additional
indexes as usage dictates in the future

cheers
Colin.W
 
Extension   5800
Direct dial   0870 429 5800


-----Original Message-----
From: Dan Bale [mailto:dbale@xxxxxxxxxxxxx] 
Sent: 17 August 2004 15:11
To: midrange-l@xxxxxxxxxxxx
Subject: SQL subquery? sub-something?


I come to the SQL well again after not knowing exactly what I'm looking for
term-wise.

In order to list customers by regional sales manager and have necessary
relevant information, I have an SQL that joins four files together, the
customer master being the primary table.  It works well.  Fast as ... heck.

Anyway, this SQL result set will be the basis for further information
gathering, i.e., sales history, forecasts, etc, for several applications.  I
would like this "base" SQL to be "invisible", like I envision DDS join
logical files where the join logic is defined in the file definition; when I
read the file, I don't worry about it being the same join logic in different
programs that use it.  Whereas, with SQL, if I add the Sales History to the
SQL statement, I seem to think there's a risk of introducing a relationship
that changes the join logic.

I don't know if this makes sense.  Don't know if I'm looking at creating an
SQL view, then using that in another SQL statement.  Or subquery.  Or just
adding to the existing "base" SQL.  I would just like to have an idea of the
best way to design it, so that it's flexible for future use.

tia,
db

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe, unsubscribe,
or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.


This e-mail has been sent by a company of Bertram Group Ltd, whose registered 
office is 1 Broadland Business Park, Norwich, NR7 0WF. 
This message, and any attachments, are intended solely for the addressee and 
may contain privileged or confidential information.  If you are not the 
intended recipient, any disclosure, copying, distribution or any action taken 
or omitted to be taken in reliance on it, is prohibited and may be unlawful.  
If you believe that you have received this email in error, please contact the 
sender immediately. Opinions, conclusions and statements of intent in this 
e-mail are those of the sender and will not bind a Bertram Group Ltd company 
unless confirmed in writing by a director independently of this message. 
Although we have taken steps to ensure that this email and any attachments are 
free from any virus, we advise that in keeping with good computing practice the 
recipient should ensure they are actually virus free.