2010/8/19 David Fetter <da...@fetter.org>: > On Thu, Aug 19, 2010 at 12:12:12PM -0500, Kevin Grittner wrote: >> David Fetter <da...@fetter.org> wrote: >> >> > Median may be useful, but we pretty much can't just call it >> > "median." Instead, we need to call it something like "left_median" >> > or "arithmetic_median." >> >> I think it would be reasonable, and perhaps preferable, to use just >> "median" for the semantics described in most dictionaries -- for >> example, this: >> >> http://www.merriam-webster.com/dictionary/median >> >> If you do a google search for "median" and poke around, you'll find >> many places where this is the only definition mentioned; the others >> seem to be rather infrequently used. Why not make the commone usage >> convenient? > > The reason not to is the same reason that MEDIAN doesn't appear in the > SQL standard, namely that what's common in one field is wrong in > another.
I think some else. The reason can be more simple - implementation of median is significantly harder then other aggregates. I looked there and Oracle11g use "median" in common sense. Regards Pavel Stehule > > Cheers, > David. > -- > David Fetter <da...@fetter.org> http://fetter.org/ > Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter > Skype: davidfetter XMPP: david.fet...@gmail.com > iCal: webcal://www.tripit.com/feed/ical/people/david74/tripit.ics > > Remember to vote! > Consider donating to Postgres: http://www.postgresql.org/about/donate > -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
