Re: SQL union - is there a CPYF *DROP type of directive?

[Charles Wilt <charles.wilt@xxxxxxxxx>]

No, you can't.  You must use explicit column names...

Actually select * is a maintenance headache...recommended practice is to
never use it in production code.

Charles


On Wed, Dec 19, 2012 at 2:45 PM, Stone, Joel <Joel.Stone@xxxxxxxxxx> wrote:

> I have two files that are ALMOST identical
>
> fileA: field1, field2, field3,                 field99
>
> fileB: field1, field2, field3, field4,    field99
>
>
> Can I create an SQL UNION without naming fields - and have SQL drop any
> fields from the second file that are NOT in the first file?
>
> Or must I name fields (creates maintenance headaches down the road).
>
> For example can I do something like:
>
> create table fileAandfileB as
> (select *  from fileA
>  union
>  select * from fileB
>                                       ) with data   *drop missing columns
>
>
>
>
> Thanks!
>
>
>
>
> ______________________________________________________________________
> This outbound email has been scanned for all viruses by the MessageLabs
> Skyscan service.
> For more information please visit http://www.symanteccloud.com
> ______________________________________________________________________
> --
> This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list
> To post a message email: MIDRANGE-L@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/midrange-l
> or email: MIDRANGE-L-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/midrange-l.