Re: FW: Random Selection from TABLE

I don't know how efficient it would be, but you could always do:

select * from mytable order by random() limit 1;

-philip

On Thu, 20 Dec 2001, Salvatore Sferrazza wrote:

> I've implemented something like this before, the way we solved it was by
> having a list of "candidate" images in a table indexed by some entity. We
> then used the front end tool (in our case, Java) to select the candidates,
> cache them and then pull randomly from the cache upon rendering the
> page. Asking SQL to do this may not be the best idea, since you don't
> want one more round-trip per page.
>
> HTH,
>
> Sal
>
> On Fri, 21 Dec 2001, Kris-Jon Fenton wrote:
>
> > Yes, I do have a question, how do I do this?
> >
> > -----Original Message-----
> > From: pgsql-novice-owner(at)postgresql(dot)org
> > [mailto:pgsql-novice-owner(at)postgresql(dot)org]On Behalf Of Josh Berkus
> > Sent: Friday, 21 December 2001 2:41 AM
> > To: Kris-Jon Fenton; pgsql-novice(at)postgresql(dot)org
> > Subject: Re: FW: Random Selection from TABLE
> >
> >
> > Kris,
> >
> > > I want to be able to select entries randomly so I can change the
> > > images on a
> > > website using PHP.
> > >
> > > Basically I need to have a randomly rotating image that will change
> > > whenever
> > > the page is refreshed.
> > >
> > > I want to store the image names in a table and have them selected
> > > from
> > > there.
> >
> > Sounds like fun! Do you have a question for the list?
> >
> > -Josh
> >
> > ______AGLIO DATABASE SOLUTIONS___________________________
> > Josh Berkus
> > Complete information technology josh(at)agliodbs(dot)com
> > and data management solutions (415) 565-7293
> > for law firms, small businesses fax 621-2533
> > and non-profit organizations. San Francisco
> >
> > ---------------------------(end of broadcast)---------------------------
> > TIP 2: you can get off all lists at once with the unregister command
> > (send "unregister YourEmailAddressHere" to majordomo(at)postgresql(dot)org)
> >
> >
> > ---------------------------(end of broadcast)---------------------------
> > TIP 6: Have you searched our list archives?
> >
> > http://archives.postgresql.org
> >
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 6: Have you searched our list archives?
>
> http://archives.postgresql.org
>