Thanks, it working.
pozdrowienia mk 2010/12/8 Marc Mamin <m.ma...@intershop.de> > something like ? > > > > Select min (case when X > 0 then X end) > > > > > > HTH, > > > > Marc Mamin > > > > *From:* pgsql-sql-ow...@postgresql.org [mailto: > pgsql-sql-ow...@postgresql.org] *On Behalf Of *Marcin Krawczyk > *Sent:* Mittwoch, 8. Dezember 2010 14:20 > *To:* Pavel Stehule > *Cc:* pgsql-sql@postgresql.org > *Subject:* Re: [SQL] conditional aggregates > > > > Yeah I know but I'm having problems creating sfunc fuction for the > aggregate. > > > > > regards > mk > > 2010/12/8 Pavel Stehule <pavel.steh...@gmail.com> > > Hello > > use a CASE statement > > http://www.postgresql.org/docs/7.4/static/functions-conditional.html > > Regards > > Pavel Stehule > > 2010/12/8 Marcin Krawczyk <jankes...@gmail.com>: > > > Hi list, > > Can anyone advise me on creating an aggregate that would take additional > > parameter as a condition ? For example, say I have a table like this > > id;value > > 1;45 > > 2;13 > > 3;0 > > 4;90 > > I'd like to do something like this > > SELECT min_some_cond_aggregate(value,0) FROM table > > to get the minimal value from table greater than 0, in this case 13. > > I can't do SELECT min(value) FROM table WHERE value > 0 as this will mess > my > > other computations. My current solution involves a function operating on > the > > output of array_accum from the docs, but I'm looking for more elegant > > solution. > > Is this possible at all ? I'm running 8.1. > > > > regards > > mk > > > > >
