Re: SQL Question

Different file names.
The client that I am doing this for has 2 sets of files for the same basic data.
The only difference between them is that one set of files ends with the suffix
'NW'.
They use this to determine what system created the data.

I have deceided to use parameter markers, as this makes it easier to create the
dynamic SQL statement. I do not need to insert quotes around my character
fields.

Thanks,

Jeff Young
Sr. Programmer Analyst
Dynax Solutions, Inc.
A wholly owned subsidiary of enherent Corp.
IBM -e(logo) server Certified Systems Exper - iSeries Technical Solutions V5R2
IBM Certified Specialist- e(logo) server i5Series Technical Solutions Designer
V5R3
IBM Certified Specialist- e(logo)server i5Series Technical Solutions
Implementer V5R3









----- Original Message ----
From: "Wilt, Charles" <WiltC@xxxxxxxxxx>
To: RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>
Sent: Tuesday, April 3, 2007 2:41:08 PM
Subject: RE: SQL Question


Different set of files, or the same set of files from different libraries?

If the same set of files from different libraries then you should be able to
use static SQL instead of
dynamic assuming that you are not using qualified names.

HTH,
Charles

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff Young
Sent: Tuesday, April 03, 2007 12:37 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: SQL Question

The SQL statement will be Dynamic as I may be using a
different set of files each time I execute the command.

Thanks,

Jeff Young
Sr. Programmer Analyst
Dynax Solutions, Inc.
A wholly owned subsidiary of enherent Corp.
IBM -e(logo) server Certified Systems Exper - iSeries
Technical Solutions V5R2 IBM Certified Specialist- e(logo)
server i5Series Technical Solutions Designer V5R3 IBM
Certified Specialist- e(logo)server i5Series Technical
Solutions Implementer V5R3









----- Original Message ----
From: "Wilt, Charles" <WiltC@xxxxxxxxxx>
To: RPG programming on the AS400 / iSeries <rpg400-l@xxxxxxxxxxxx>
Sent: Tuesday, April 3, 2007 12:27:06 PM
Subject: RE: SQL Question


Parameter markers are used with dynamic SQL.

Host fields for static.

Static performs better than dynamic.

If you can use static. Then I recommend you do so.

Charles

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff Young
Sent: Tuesday, April 03, 2007 12:18 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: SQL Question

I have 2 files with a 1 to N relationship where I need to select a
common field from the 2nd file.
Since there is a 1 to N, I can not use SELECT INTO, but must use
SELECT with either DISTINCT or GROUP BY.
The selection criteria will vary every time I need to select this
data.
Is it better to use the host fields in the SELECT statement WHERE
clause, or to use Parameter Markers and put the host fields in the
OPEN statement?

Thanks,

Jeff Young
Sr. Programmer Analyst
Dynax Solutions, Inc.
A wholly owned subsidiary of enherent Corp.
IBM -e(logo) server Certified Systems Exper - iSeries Technical
Solutions V5R2 IBM Certified Specialist- e(logo) server i5Series
Technical Solutions Designer V5R3 IBM Certified Specialist-
e(logo)server i5Series Technical Solutions Implementer V5R3



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