Gerhardus,

>I will use a different example.
>
>select estimator,estimatedvalue as Test1,estimatedtime as
>Test2,(Test1/Test2) from dar
>
>The problem is Test1 and Test2 is unknown but they do not need to be.

This won't work because Test1 and Test2 are not inputs to the query. You
can achieve some sort of output here like this:

select
estimator,
estimatedvalue,
estimatedtime,
estimatedvalue/estimatedtime as estimatedrate
from dar

If this is heading where you want to go, the next thing to attend to is
what you get as a result. For example, if both of the inputs to the
expression are integer types then you will get a downwardly truncated
integer output in Fb/IB 6. If either of the inputs is null you will get a
null result. If the divisor is 0 then you will get a runtime error
(divide_by_zero)....and so on...

heLen