void MainForm::on_Ok_d_clicked()
{

    int id = ui->tableView_d->model()->index(0,0).data(0).toInt();
    int num=0; 
    bool find=false;
    while(id != 0){  //по циклу просматриваю все первые поля
        if(id==ui->code_d_d->text().toInt()){find=true; break;}
        num=num+1;
        id = ui->tableView_d->model()->index(num,0).data(0).toInt();
    }
    ui->label_name_d_d->setNum(id); //это я просто смотрю какой id - найден ли он. Он находится.
    QSqlQuery query;
    if(find==true)
    {
        query.prepare("UPDATE DIST SET CODE_D = :CODE_D, NAME_D = :NAME_D WHERE CODE_D = :CODE_D");
        query.bindValue(":CODE_D",id);
        query.bindValue(":NAME_D",ui->name_d_d->text());
        query.exec();
    }
    else //[b]добавление новой записи работает[/b]
    {
        query.prepare("INSERT INTO DIST (CODE_D, NAME_D) VALUES (:CODE_D, :NAME_D) ");
        query.bindValue(":CODE_D",ui->code_d_d->text().toInt());
        query.bindValue(":NAME_D",ui->name_d_d->text());
        query.exec();
    }
    Refresh();
}

        query.prepare("UPDATE DIST SET CODE_D = :CODE_D, NAME_D = :NAME_D WHERE CODE_D = :CODE_D");
        query.bindValue(":CODE_D",10); //запись с CODE_D=10 естественно есть в таблице
        query.bindValue(":NAME_D",ui->name_d_d->text());
        query.exec();

    query.exec("CREATE TABLE DIST ("
               "CODE_D INTEGER PRIMARY KEY NOT NULL, "
               "NAME_D VARCHAR(20) "
               ");");
//...
 QSqlQuery query;
        query.prepare("UPDATE DIST SET CODE_D = :CODE_D,NAME_D = :NAME_D WHERE CODE_D = :CODE_D");
        query.bindValue(":NAME_D","tra-ta-ta");
        query.bindValue(":CODE_D", 31);
        query.exec();

        query.prepare("UPDATE DIST SET CODE_D = :CODE_D1, NAME_D = :NAME_D WHERE CODE_D = :CODE_D2");
        query.bindValue(":CODE_D1",10);
        query.bindValue(":NAME_D",ui->name_d_d->text());
        query.bindValue(":CODE_D2",10);
        query.exec();