Anderson,

A> To me, it seens the answer is "no. they´re not 'calculated' at all if
A> not present in the select columns list"

A> Can any one confirm that?!

I have just spent a whole two minutes doing the simple test that Sean
suggested, and I can confirm the above.

User communities are great, but at times I wonder if they are in some
way reducing our ability to do by ourselves. :-)

Ciao
--
Nando Dessena
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