Subject Re: [IBO] Parsing error for Fb 2.0 with derived tables?
Author Hans
It works now with IBO,
with or without the additional where condition

> select count(*)
> from
> (select a from tablea where such and such
> union select b from tableb where such and such)
> to work with Firebird 2.0 (though, admittedly, I haven't tried)