On Fri, Jul 11, 2008 at 01:24:28PM +1000, Klint Gore wrote:
> Can someone familiar with the source for DISTINCT ON comment on how hard
> it would be to add another parameter to return more than one row?
you can make top-n per group quite easily using the technique described
here:
http://www.depesz.com/index.php/2007/08/17/rownum-anyone-cumulative-sum-in-one-query/
best regards,
depesz