Re: [GENERAL] average/stddev on all values returned by a select distinct

2007-07-17 Thread ann hedley
Michael Fuhr wrote: On Tue, Jul 17, 2007 at 01:51:21PM +0100, ann hedley wrote: What I want is the average and stddev of the set of lengths returned by this query. Something like... select average(select distinct on (id) length(consensus) from cluster order by id,length(consensus) desc);

Re: [GENERAL] average/stddev on all values returned by a select distinct

2007-07-17 Thread Michael Fuhr
On Tue, Jul 17, 2007 at 01:51:21PM +0100, ann hedley wrote: > What I want is the average and stddev of the set of lengths returned by > this query. Something like... > > select average(select distinct on (id) length(consensus) from cluster > order by id,length(consensus) desc); I think this is

[GENERAL] average/stddev on all values returned by a select distinct

2007-07-17 Thread ann hedley
I have this query which returns the length of the longest consensus for each id. lumbribase=# select distinct on (id) length(consensus) from cluster order by id,length(consensus) desc; length 647 680 273 384 1285 What I want is the average and stddev of the set of leng