On Fri, May 22, 2009 at 03:23:07PM +0000, arta...@comcast.net 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. Excellent observation Dave. Sometimes I can't see outside of the box I'm in. And at the time I was focusing on text so statistics was in another box. I've update post with final functions for mode(), median() and range(). Scott
