"Database link" для Firebird

Пример:

execute block returns (myblob blob) as
begin
FOR EXECUTE STATEMENT 'select data from anydata'
ON EXTERNAL DATA SOURCE '127.0.0.1/3050:c:/BASE.FDB' AS USER 'SYSDBA' PASSWORD 'masterkey'
INTO :myblob
DO SUSPEND;
end

Узнал отсюда:
http://www.firebirdfaq.org/faq16/