begin
    execute immediate 'delete from PRECIO_FIXO_PEDAGIO where PRACAPEDAGIO_ID not in (select CASETAPEAJE_ID from caseta_peaje)';
    exception when others  then null;
end;
/    
    
begin
    execute immediate 'alter table PRECIO_FIXO_PEDAGIO add constraint PRACAPEDGAIO_CASETA foreign key("PRACAPEDAGIO_ID") references "CASETA_PEAJE"("CASETAPEAJE_ID")';
    exception when others  then null;
end;
/