Re: Any ideas???

Maybe create a single logical over all three files..

David L. Mosley, Jr.
Systems Analyst
2000 CentreGreen Way
Suite 250
Cary, NC 27513



                    "Gurrieri Fabrizio"
                    <fabrizio.gurrieri@bar        To:     
<rpg400-l@midrange.com>
                    tolini.it>                    cc:
                    Sent by:                      Subject:     Any ideas???
                    rpg400-l-admin@midrang
                    e.com


                    06/26/02 02:51 AM
                    Please respond to
                    rpg400-l






This is a multi-part message in MIME format.
--
[ Picked text/plain from multipart/alternative ]
Hi,
   I have 3 big files with the same record format, they are divided by date
=> the first are the most recent records, the second the old records and
the third the historical records (totally are 63 milion of records). Now I
have to run SQL (into an SQLRPGLE) on all of these three files order by
date and other three fields with some selection and I've the problem below:
when I run SQL for a period that is completely included in the first file
the SQL (it works using UNION) read all three files and naturally it works
for for too much hours.
How can I optimize my SQL statement, any ideas???

Thanks a lot


Fabrizio Gurrieri - BARTOLINI SPA
Via E.Mattei  42 - 40138 BOLOGNA (Italy)
Tel:+39 051 6015593 - Fax:+39 051 530365
E-Mail: Fabrizio.Gurrieri@bartolini.it
Internet: http://www.bartolini.it <http://www.bartolini.it/>


_______________________________________________
This is the RPG programming on the AS400 / iSeries (RPG400-L) mailing list
To post a message email: RPG400-L@midrange.com
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/cgi-bin/listinfo/rpg400-l
or email: RPG400-L-request@midrange.com
Before posting, please take a moment to review the archives
at http://archive.midrange.com/rpg400-l.