Kashmir wrote:
>
> thx for anwering!,
>
> i was more looking for a percentile calculation as in http://en.wikipedia.org/wiki/Percentile
> usually i do this in perl with the 'Statistics::Descriptive' module,
> but it would help me alot if i could solve this within the sql query,
> and would not have to push all the data into a perl arrays first..
Have you considered writing a function in the PL/R language? It has
percentiles (actually quantiles) and all sorts of useful math stuff.
See http://www.joeconway.com/plr/
--
Alvaro Herrera http://www.CommandPrompt.com/
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