--- In firebird-support@yahoogroups.com, Steve Wiser <steve@...> wrote:

>
> Not open source, but we have used Digital-Metaphor's ReportBuilder

in

> the past with success.
>
> -steve
>
> Stephen Boyd wrote:
> >
> > Does anyone know of any Delphi or C++ visual query builder

components

> > that can be added to an application to allow an end user to build

SQL

> > queries? Open source preferred.
> >
> >
>

I bought this: http://www.activequerybuilder.com (Delphi and BCB, VCL
and .NET, COM, a list of supported DBMSs that includes Firebird).
It's not free, but it's royalty-free and source is available.