Re: SQL Join - MySQL/PostgreSQL difference?

Ian,

Thanx - I figured the same about the ambiguity.  I'll keep tryin' to
debug this with the vendor, then.

-Brice

Ian Harding wrote:
>
> Brice Ruth wrote:
>
> > Greetings.
> >
> > I'm working with a product provided by a third part that interfaces to
> > data housed in a database of your choice.  Previously, my choice was
> > MySQL - apparently it handled certain queries too slowly, so I'm giving
> > PostgreSQL a shot.  Here's the query:
> >
> > SELECT
> >   a.Number,
> >   a.Code,
> >   a.Text
> > FROM
> >   b,
> >   a
> > WHERE
> >   (b.Id = a.Id) AND
> >   (VersionId = 'key1') AND
> >   (Category = 'key2') AND
> >   (b.d_Id = 'key3')
> > ORDER BY
> >   a.Number;
> >
> > (my apologies: I had to 'mangle' the table/column names because of NDA)
> >
> > So my question is this: would this query operate differently in MySQL
> > than in PostgreSQL?  The reason I ask is that this query in MySQL
> > returns results, yet in PostgreSQL it does not.  I read a post about
> > PostgreSQL not supporting outer joins, but I don't have enough
> > experience with SQL to determine if this is such a query or not.  Please
> >
> > advise.
> >
> > Any help will be (as always) sincerely appreciated.
> >
> > --
> > Brice Ruth
> > WebProjkt, Inc.
> > VP, Director of Internet Technology
> > http://www.webprojkt.com/
>
> It should work the same in both.  The only thing I notice is that not all
> the field names are qualified with table names or aliases.  That can lead
> to ambiguity, but the query would blow up on both databases if that were a
> problem.
>
> Ian

--
Brice Ruth
WebProjkt, Inc.
VP, Director of Internet Technology
http://www.webprojkt.com/