RE: SQL (Count/Distinct Groups) Question

Walden's is the simplest, probably. But another syntax illustrates using a
subselect as a table:

select count(*) from (select distinct VHIDTEfrom plpvh) as x

This generates (conceptually, at least) an internal temporary result that
can be handled just like an existing table. Needs to be a fairly recent
release, I think.

At 10:24 AM 5/9/02 -0700, you wrote:
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>That did it!  Thank you... I had no idea, that syntax was possible ..
>
>
> > -----Original Message-----
> > From: Walden H. Leverich [SMTP:WaldenL@TechSoftInc.com]
> > Sent: Thursday, May 09, 2002 10:20 AM
> > To:   'midrange-l@midrange.com'
> > Subject:      RE: SQL (Count/Distinct Groups) Question
> >
> > This is one of the few times you don't use a * in count(). Try
> >
> > Select count(Distinct VHIDTE)
> >  from plpvh
> >  where VHDIVN = '500'
> >
> > -Walden
> >
> >
> > ------------
> > Walden H Leverich III
> > President
> > Tech Software
> > (516) 627-3800 x11
> > (208) 692-3308 eFax
> > WaldenL@TechSoftInc.com
> > http://www.TechSoftInc.com
> >
> > Quiquid latine dictum sit altum viditur.
> > (Whatever is said in Latin seems profound.)
> >
> >
> >
> > -----Original Message-----
> > From: Hatzenbeler, Tim [mailto:thatzenbeler@clinitech.net]
> > Sent: Thursday, May 09, 2002 13:01
> > To: 'midrange-l@midrange.com'
> > Subject: SQL (Count/Distinct Groups) Question
> >
> >
> > This message is in MIME format. Since your mail reader does not understand
> > this format, some or all of this message may not be legible.
> > --
> > [ Picked text/plain from multipart/alternative ]
> > I'm stumped....  Please help...
> >
> > If I issue this command.
> > SELECT DISTINCT VHIDTE,count(*) FROM
> > plpvh WHERE VHDIVN = '500'
> > GROUP BY vhidte
> >
> > I get this....
> >  2/11/2002            533
> >  2/21/2002            112
> >  2/26/2002            210
> >  3/08/2002            173
> >  3/13/2002            322
> >  3/22/2002            247
> >  3/27/2002            292
> >  4/04/2002            266
> >
> >       But now, All I want is the number of different Dates, so in this
> > example I would like Count(*) set to : 8
> >
> >       Is that possible, In one SQL statement?
> >
> >       Thanks, TIm
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