/**
* Backup cernet_user, cernet_team
*/
public function backup()
{
$data['statecode'] = 1;
DBModel::updateDB('cernet_user', array(), $data);
DBModel::copyDB('cernet_user', 'second_user');
DBModel::copyDB('cernet_team', 'second_team');
DBModel::copyDB('cernet_teacher', 'second_teacher');
DBModel::copyDB('cernet_report', 'second_report');
DBModel::copyDB('cernet_teammate', 'second_teammate');
}