RE: SQL Question - Merging files or result sets?

["Bradley V. Stone" <bvstone@xxxxxxxxxxxx>]

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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