Martijn,

> > I was looking for a SQL expression, or maybe I need to create a UDF to
> > do some thing like:
> >
> > SELECT SUM_EX(Age) FROM Persons
> >
> >
> > In any case, thank you for your prompt reply.
>
> Are UDFs on groups of records even possible?

I am pretty sure you have deliberately asked a rhetorical question (given how long you have been using IB/FB).

Aggregate UDF functions are NOT possible.


Sean