var
NodoNivel, Nodo : TreeNode;
begin
with TreeView1.Items do
begin
NodoNivel := Add(nil, 'Nivel1');
FDQnd1.Close;
FDQnd1.SQL.Text:=('select * from public.estruc_nvl1');
FDQnd1.Open();
begin
Nodo := AddChild(NodoNivel, FDQnd1.FieldByName('Departamento').AsString);
Nodo.ImageIndex := -1;
FDQnd1.Next;
end
NodoNivel := Add(nil, 'Nivel2');
NodoNivel := Add(nil, 'Nivel3');
end;
end;