Ulf, As a partial answer to your question about statistical functions
and std. deviation in particular, I have pulled out an example query
that I have used in the past as an example:
select lab_no, prep_no, avg(hai), max(hai), min(hai),
|/((sum(hai^2)-(count(hai)::float8)*(avg(hai)^2))/count(h
Hello out there,
many thanks for everybody helping with extracting month information
and so on from date columns.
Realizing that apparently a package with simple statistical
functions/aggregates like standard deviation doesn't exist, I have to
write one on my own. But, as stated earlier, I have
Hello Ulf,
mercoledì, 21 ottobre 98, you wrote:
UM> I posted the questions below a few days ago to the SQL list, but
UM> apparently there is nobody there who can help -- maybe I'm luckier in
UM> this list? :-)
UM> --
UM> I'm a
