MG>obligatory toppost
> > http://www.postgresql.org/docs/8.3/static/sql-createaggregate.html
> > is for
> > 8.3 where there were some changes to the number of
> > arguments an aggregate
> > could take. I believe it's also more descriptive
> > documentation.
> >
> > of course for things like average you wouldn't need a
> > custom type...
>
> Thanks for the information it is very useful. The reason that I ask, is
that I am trying to develop a way to calculate the average power
factor(scalar) of a Motor Control Center (among other things). The
Electrical Engineers that are asking for the report introduced me to a
rather complicated formula to implement in standard SQL.
>
> The best way that I can describe the problem get the PF Is this Picofarad
or PetaFarad?
is finding the angle between Xcomp
MG>what is Xcomp?
/hypotenuse after having used Pythagorean theorem to find the hypotenuse
after having summing of multiple 2 coordinate vectors(the EEs use the term
phasers)
MG>set on stun?
for each MCC cubical.
MG>assume Motor Control Cubical?
>
> It seems they have need for quite a few other little aggregate functions
that they would like me to make if I can get this one done first.
>
> Anyway thank for the push in the right direction!
>
> Regards,
> Richard Broersma Jr.
>
>
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