Support for multi-column aggregate functions

Anthony Damico ajdamico at gmail.com
Wed Apr 27 15:46:42 CEST 2016


possible to translate one of these?

http://stackoverflow.com/questions/16450779/another-approach-to-percentiles


On Wednesday, April 27, 2016, Anderson, David B <david.b.anderson at citi.com>
wrote:

> I am really looking for an implementation of a weighted percentile within
> a group.
>
> -----Original Message-----
> From: Anderson, David B [ICG-MKTS]
> Sent: Wednesday, April 27, 2016 9:18 AM
> To: users-list at monetdb.org <javascript:;>
> Subject: Support for multi-column aggregate functions
>
> All,
>
> Does the current version of MonetDB support multi-column aggregate
> functions? I need to create a function which returns the "quantiles" of one
> column using another column as a weighting. It looks like PostgreSQL
> supports multi-column aggregates as of 8.2.
>
> I could write an embedded R function to compute this, but want to know if
> it is even possible to pass in multiple columns.
>
> Thanks,
> Dave
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