Procura com mais de um Banco de Dados

edit1.text:= dbcombobox1.Text;
QueryPrinc.active := false;
QueryPrinc.sql.clear;
QueryPrinc.sql.add('select * from estrucpr where portugues = "' + edit1.Text + '"');
QueryPrinc.active:= true;
 
if DBcodEl.text=DBcodEl.text then
edit2.Text:= DBcodEl.Text;
 
QuerySin.active := false;
QuerySin.sql.clear;
QuerySin.sql.add(' select * from sinonimo where sin_est_id = "' + edit2.text + ' "');
QuerySin.active:= true;
 
 if DBcodEl.text=DBcodEl.text then
edit3.Text:= DBcodEl.Text;
 
QueryPropFis.active := false;
QueryPropFis.sql.clear;
QueryPropFis.sql.add('select * from FIQU_PRO where fiqu_id = "' + edit3.Text + '"');
QueryPropFis.active:= true;