void Database::removeClient(unsigned int id)
{
    for (vector<Client*>::iterator i = vectorClient_.begin(); i != vectorClient_.end(); i++)
    {
        if ((*i)->id() == id)
        {
            delete (*i);
            (*i) = NULL;
        }
    }

    // Poistetaan tyhjät osoittimet
    vectorClient_.erase(remove(vectorClient_.begin(),
                                  vectorClient_.end(),
                                  NULL),
                        vectorClient_.end()
                        );

    QMessageBox qMessagebox;
    QString text = "Asiakas (id";
    text += " ";
    text += QString::fromStdString(lexical_cast<string>(id));
    text += ") ";
    text += "poistettiin tietokannasta";
    text += ".";
    qMessagebox.setText(text);
    qMessagebox.setIcon(QMessageBox::Information);
    qMessagebox.addButton(QMessageBox::Ok);
    qMessagebox.exec();
}