On Sat, 5 Mar 2016 21:22:23 +0100
Stephan Beal <sgbeal at googlemail.com> wrote:

> i'm not aware of any aggregates which (in normal use) take no
> arguments

Nondeterministic functions need not take any arguments.  Built-in
examples include NOW().  Your UDF could implement the Dilbert RNG:

        http://dilbert.com/strip/2001-10-25

--jkl



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