On Fri, May 22, 2009 at 03:23:07PM +0000, artacus@xxxxxxxxxxx wrote: > > I want to use an aggregate function that will return the most > > commonly occurring value in a column. > > It's actually dead simple in Postgres. No C either. You just need to > create an aggregate function. I wrote a most() aggregate a while > back that does exactly what you are asking for. Here, I'll add it to > my blog... > > http://scottrbailey.wordpress.com/2009/05/22/postgres-adding-custom-aggregates-most/ Such an aggregate should probably be called, "mode," that being the probability/statistics name for the concept. Cheers, David. -- David Fetter <david@xxxxxxxxxx> http://fetter.org/ Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter Skype: davidfetter XMPP: david.fetter@xxxxxxxxx Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
