" AND stg.studiengang_kz NOT IN ?"]; protected $_params_for_checking = ['studiengang_kz' => " AND stg.studiengang_kz = ?", 'prestudent_id' => " AND pre.prestudent_id = ?"]; protected $_fehlertext_params = ['prestudent_id']; protected $_resolution_params = ['prestudent_id']; }