Re: Any ideas???

[dmosley@xxxxxxxxxx]

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"
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<rpg400-l@midrange.com>
                    tolini.it>                    cc:
                    Sent by:                      Subject:     Any ideas???
                    rpg400-l-admin@midrang
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                    06/26/02 02:51 AM
                    Please respond to
                    rpg400-l






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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/>


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