RE: SQL Question - Merging files or result sets?

Yep, just did that.. oh well, I guess it's better that way anyhow.

Now, for the final question. I need to get a count of the records selected.
:) Is there a trick if they select both files to get one value for the
count of the entire rs?

I normally just make another SQL statement like this:

eval SQLCount = 'SELECT COUNT(*) '
'FROM file ' +
%trim(SQLWhere)

But now with 2 files, could get tricky.

Bradley V. Stone
BVSTools - www.bvstools.com
eRPG SDK - www.erpgsdk.com

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Wilt, Charles
Sent: Thursday, March 13, 2008 3:11 PM
To: Midrange Systems Technical Discussion
Subject: RE: SQL Question - Merging files or result sets?


Yep...

For a union, you have to have the same number and types of columns.

You're going to have to explicitly list the fields from the file
with the extra field, making sure to
leave the extra field out.

Charles Wilt
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of Bradley V. Stone
Sent: Thursday, March 13, 2008 4:08 PM
To: Midrange Systems Technical Discussion
Subject: RE: SQL Question - Merging files or result sets?

Ok, Darn. Almost worked. I found out the file in production

(fileB) does

have one extra field at the end.

Message ID . . . . . . : SQL0421 Severity . . . . . . . : 30
Message type . . . . . : Diagnostic
Date sent . . . . . . : 03/13/08 Time sent . . . . . . :
15:06:05

Message . . . . : Number of UNION operands not equal.
Cause . . . . . : The operands of a UNION or UNION ALL must have the
same
number of columns.
Recovery . . . : Correct the SQL statement so that it has the same
number
of operands in each SELECT list.

Is this telling me it won't work because the files don't have the same
number of coumns?

For select I'm using select * and fetching into a DS defined

externally by

fileA.

Bradley V. Stone
BVSTools - www.bvstools.com
eRPG SDK - www.erpgsdk.com

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Adam Glauser
Sent: Thursday, March 13, 2008 1:32 PM
To: midrange-l@xxxxxxxxxxxx
Subject: Re: SQL Question - Merging files or result sets?


Bradley V. Stone wrote:

This isn't a join, it's two files with identical layouts, but

different

field names and different category of data. Otherwise the files are
identical.

When a user does a search, they can search file A, file B, or

both. So I'd

like to try to write this dynamic enough so all I do is check the

search

flags they set and build my SQL appropriatly. Especially when

they search

both so it will "mesh" the data from the two files in the

result set.

I think that UNION will do the trick. Perhaps you could do
something like:

selectA = 'SELECT <the fields> FROM fileA WHERE <criteria>'
selectB = 'SELECT <the fields> FROM fileB WHERE <criteria>'
order = ' ORDER BY <ordering fields>'

if (search = both A and B)
query = selectA + ' UNION ' + selectB + order

elseif (search = A only)
query = selectA + order

else
query = selectB + order

Would something like that do what you're after?
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