diff --git a/application/config/routes.php b/application/config/routes.php
index de8e6e098..eba6688ff 100644
--- a/application/config/routes.php
+++ b/application/config/routes.php
@@ -1,6 +1,6 @@
 <?php
 
-defined('BASEPATH') OR exit('No direct script access allowed');
+if (! defined('BASEPATH')) exit('No direct script access allowed');
 
 /*
 | -------------------------------------------------------------------------
@@ -51,7 +51,7 @@ defined('BASEPATH') OR exit('No direct script access allowed');
 |   my-controller/my-method -> my_controller/my_method
 */
 $route['default_controller'] = defined('CIS4') && CIS4 ? 'Cis4' : 'Vilesci';
-$route['translate_uri_dashes'] = FALSE;
+$route['translate_uri_dashes'] = false;
 
 // Class name conflicts
 $route['api/v1/organisation/[S|s]tudiengang/(:any)'] = 'api/v1/organisation/studiengang2/$1';
@@ -71,9 +71,9 @@ $route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})'] = 'api/frontend/v1/stv
 
 // (studiensemester_kurzbz)/inout[/(incoming|outgoing|gemeinsamestudien)]
 $route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/inout'] = 'api/frontend/v1/stv/Students/index';
-$route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/inout/incoming'] = 'api/frontend/v1/stv/Students/getIncoming';
-$route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/inout/outgoing'] = 'api/frontend/v1/stv/Students/getOutgoing';
-$route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/inout/gemeinsamestudien'] = 'api/frontend/v1/stv/Students/getGemeinsamestudien';
+$route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/inout/incoming'] = 'api/frontend/v1/stv/Students/getIncoming/$1';
+$route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/inout/outgoing'] = 'api/frontend/v1/stv/Students/getOutgoing/$1';
+$route['api/frontend/v1/stv/[sS]tudents/([WS]S[0-9]{4})/inout/gemeinsamestudien'] = 'api/frontend/v1/stv/Students/getGemeinsamestudien/$1';
 
 // (studiengang_kz)/prestudent[/(studiensemester_kurzbz)[/(filter)[/(otherfilter)]]]
 $route['api/frontend/v1/stv/[sS]tudents/(-?[0-9]+)/prestudent'] = 'api/frontend/v1/stv/Students/getPrestudents/$1';
diff --git a/application/controllers/api/frontend/v1/stv/Students.php b/application/controllers/api/frontend/v1/stv/Students.php
index 9de0c29b1..e715f467e 100644
--- a/application/controllers/api/frontend/v1/stv/Students.php
+++ b/application/controllers/api/frontend/v1/stv/Students.php
@@ -51,7 +51,6 @@ class Students extends FHCAPI_Controller
 				'lehre'
 			)
 		);
-
 	}
 
 	/**
@@ -75,7 +74,7 @@ class Students extends FHCAPI_Controller
 	 * /(studiengang_kz)/(orgform)/prestudent/(studiensemester_kurzbz)/(filter)					=> getPrestudentsOrgform
 	 * /(studiengang_kz)/(orgform)/prestudent/(studiensemester_kurzbz)/(filter)/(otherfilter)	=> getPrestudentsOrgform
 	 *
-	 * /(studiensemester_kurzbz)/(studiengang_kz)/(semester)/grp/(gruppe)	=> getStudentsSpezialguppe
+	 * /(studiensemester_kurzbz)/(studiengang_kz)/(semester)/grp/(gruppe)	=> getStudentsSpezialgruppe
 	 *
 	 * /(studiensemester_kurzbz)/(studiengang_kz)								=> getStudents
 	 * /(studiensemester_kurzbz)/(studiengang_kz)/(semester)					=> getStudents
@@ -101,39 +100,183 @@ class Students extends FHCAPI_Controller
 	}
 
 	/**
+	 * @param string		$studiensemester_kurzbz
+	 *
 	 * @return void
 	 */
-	public function getIncoming()
+	public function getIncoming($studiensemester_kurzbz)
 	{
 		$this->addMeta('ci_method', __FUNCTION__);
-		// TODO(chris): IMPLEMENT!
-		$this->terminateWithSuccess([]);
+		$this->addMeta('ci_params', [
+			'studiensemester_kurzbz' => $studiensemester_kurzbz
+		]);
+		
+
+		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
+
+
+		$this->PrestudentModel->addJoin(
+			"(
+				SELECT prestudent_id 
+				FROM public.tbl_prestudentstatus
+				WHERE status_kurzbz = 'Incoming'
+				AND studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
+			) test",
+			"prestudent_id"
+		);
+
+
+		$this->prepareQuery($studiensemester_kurzbz);
+
+		$this->PrestudentModel->addSelect("COALESCE(
+			v.semester::text, 
+			CASE 
+				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
+				THEN pls.ausbildungssemester::text 
+				ELSE ''::text 
+			END
+		) AS semester", false);
+		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
+		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
+		
+		$this->addSelectPrioRel();
+
+		$this->addFilter($studiensemester_kurzbz);
+
+
+		$result = $this->PrestudentModel->load();
+		
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($data);
 	}
 
 	/**
+	 * @param string		$studiensemester_kurzbz
+	 *
 	 * @return void
 	 */
-	public function getOutgoing()
+	public function getOutgoing($studiensemester_kurzbz)
 	{
 		$this->addMeta('ci_method', __FUNCTION__);
-		// TODO(chris): IMPLEMENT!
-		$this->terminateWithSuccess([]);
+		$this->addMeta('ci_params', [
+			'studiensemester_kurzbz' => $studiensemester_kurzbz
+		]);
+		
+
+		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
+
+
+		$this->PrestudentModel->addJoin(
+			"(
+				SELECT prestudent_id 
+				FROM bis.tbl_bisio bis 
+				JOIN public.tbl_student USING (student_uid)
+				JOIN public.tbl_studiensemester stdsem ON (
+					(bis.von >= stdsem.start AND bis.von <= stdsem.ende) 
+					OR 
+					(bis.bis >= stdsem.start AND bis.bis <= stdsem.ende) 
+					OR 
+					(bis.von <= stdsem.start AND bis.bis >= stdsem.ende)
+				)
+				WHERE NOT EXISTS (
+					SELECT 1 
+					FROM public.tbl_prestudentstatus 
+					WHERE status_kurzbz = 'Incoming'
+					AND prestudent_id = tbl_student.prestudent_id
+				) AND stdsem.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
+				GROUP BY prestudent_id
+			) test",
+			"prestudent_id"
+		);
+
+
+		$this->prepareQuery($studiensemester_kurzbz);
+
+
+		$this->PrestudentModel->addSelect("COALESCE(
+			v.semester::text, 
+			CASE 
+				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
+				THEN pls.ausbildungssemester::text 
+				ELSE ''::text 
+			END
+		) AS semester", false);
+		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
+		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
+		
+		$this->addSelectPrioRel();
+
+		$this->addFilter($studiensemester_kurzbz);
+
+
+		$result = $this->PrestudentModel->load();
+		
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($data);
 	}
 
 	/**
+	 * @param string		$studiensemester_kurzbz
+	 *
 	 * @return void
 	 */
-	public function getGemeinsamestudien()
+	public function getGemeinsamestudien($studiensemester_kurzbz)
 	{
 		$this->addMeta('ci_method', __FUNCTION__);
-		// TODO(chris): IMPLEMENT!
-		$this->terminateWithSuccess([]);
+		$this->addMeta('ci_params', [
+			'studiensemester_kurzbz' => $studiensemester_kurzbz
+		]);
+		
+
+		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
+
+
+		$this->PrestudentModel->addJoin(
+			"(
+				SELECT prestudent_id
+				FROM bis.tbl_mobilitaet 
+				WHERE studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
+			) bis",
+			"prestudent_id"
+		);
+
+
+		$this->prepareQuery($studiensemester_kurzbz);
+
+
+		$this->PrestudentModel->addSelect("COALESCE(
+			v.semester::text, 
+			CASE 
+				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
+				THEN pls.ausbildungssemester::text 
+				ELSE ''::text 
+			END
+		) AS semester", false);
+		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
+		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
+		
+		$this->addSelectPrioRel();
+
+		$this->addFilter($studiensemester_kurzbz);
+
+
+		$result = $this->PrestudentModel->load();
+		
+
+		$data = $this->getDataOrTerminateWithError($result);
+
+		$this->terminateWithSuccess($data);
 	}
 
-	public function getPrestudents($studiengang_kz,
-		$studiensemester_kurzbz = null, $filter = null
-	)
-	{
+	public function getPrestudents(
+		$studiengang_kz,
+		$studiensemester_kurzbz = null,
+		$filter = null
+	) {
 		$this->addMeta('ci_method', __FUNCTION__);
 		$this->addMeta('ci_params', array(
 			'studiengang_kz' => $studiengang_kz,
@@ -144,10 +287,12 @@ class Students extends FHCAPI_Controller
 		$this->fetchPrestudents($studiengang_kz, $studiensemester_kurzbz, $filter);
 	}
 
-	public function getPrestudentsOrgform($studiengang_kz, $orgform_kurzbz,
-		$studiensemester_kurzbz = null, $filter = null
-	)
-	{
+	public function getPrestudentsOrgform(
+		$studiengang_kz,
+		$orgform_kurzbz,
+		$studiensemester_kurzbz = null,
+		$filter = null
+	) {
 		$this->addMeta('ci_method', __FUNCTION__);
 		$this->addMeta('ci_params', array(
 			'studiengang_kz' => $studiengang_kz,
@@ -227,7 +372,7 @@ class Students extends FHCAPI_Controller
 
 				$stg = $this->getDataOrTerminateWithError($result);
 				if (!$stg)
-					$this->terminateWithValidationErrors(['' => 'Studiengang does not exist']); // TODO(chris): phrase
+					$this->terminateWithSuccess([]);
 				$stg = current($stg);
 
 				$where['ps.status_kurzbz'] = 'Interessent';
@@ -296,7 +441,10 @@ class Students extends FHCAPI_Controller
 				break;
 			default:
 				if (!$studiensemester_kurzbz) {
-					// TODO(chris): this does not work with $orgform_kurzbz != null
+					/** NOTE(chris):
+					 * show all prestudents in this stg who don't have a status
+					 * $orgform_kurzbz does not change the results since orgform is stored in the status table
+					 */
 					$where['ps.status_kurzbz'] = null;
 				} else {
 					$this->PrestudentModel->db->where_in('ps.status_kurzbz', [
@@ -310,42 +458,18 @@ class Students extends FHCAPI_Controller
 				break;
 		}
 
-		/*
-			$this->PrestudentModel->addJoin('public.tbl_studiengang stg', 'studiengang_kz', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_person p', 'person_id');
-			$this->PrestudentModel->addJoin('public.tbl_prestudentstatus pls', '
-				pls.status_kurzbz=public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.prestudent_id=tbl_prestudent.prestudent_id 
-				AND pls.studiensemester_kurzbz=public.get_stdsem_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.ausbildungssemester=public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)', 'LEFT');
-			$this->PrestudentModel->addJoin('lehre.tbl_studienplan sp', 'studienplan_id', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_prestudentstatus ps', '
-				ps.status_kurzbz=public.get_rolle_prestudent(tbl_prestudent.prestudent_id, ' . $stdsemEsc . ') 
-				AND ps.prestudent_id=tbl_prestudent.prestudent_id 
-				AND ps.studiensemester_kurzbz=public.get_stdsem_prestudent(tbl_prestudent.prestudent_id, ' . $stdsemEsc . ') 
-				AND ps.ausbildungssemester=public.get_absem_prestudent(tbl_prestudent.prestudent_id, ' . $stdsemEsc . ')', 'LEFT');*/
 		$this->prepareQuery($studiensemester_kurzbz);
 		
 		$this->PrestudentModel->addSelect("
-			CASE WHEN ps.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
-			THEN ps.ausbildungssemester::text 
-			ELSE ''::text END AS semester", false);
+			CASE 
+				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
+				THEN ps.ausbildungssemester::text 
+				ELSE ''::text 
+			END AS semester", false);
 		$this->PrestudentModel->addSelect("'' AS verband");
 		$this->PrestudentModel->addSelect("'' AS gruppe");
 		$this->addSelectPrioRel();
 
-		//add status per semester
-		$this->PrestudentModel->addSelect(
-			"(
-				SELECT status_kurzbz
-				FROM public.tbl_prestudentstatus pss
-				WHERE pss.prestudent_id = public.tbl_prestudent.prestudent_id
-				  AND pss.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
-				ORDER BY GREATEST(pss.datum, '0001-01-01') DESC
-				LIMIT 1
-				) AS statusofsemester"
-		);
-
 		$this->addFilter($studiensemester_kurzbz);
 
 		$result = $this->PrestudentModel->loadWhere($where);
@@ -355,10 +479,13 @@ class Students extends FHCAPI_Controller
 		$this->terminateWithSuccess($data);
 	}
 
-	public function getStudents($studiensemester_kurzbz,
-		$studiengang_kz, $semester = null, $verband = null, $gruppe = null
-	)
-	{
+	public function getStudents(
+		$studiensemester_kurzbz,
+		$studiengang_kz,
+		$semester = null,
+		$verband = null,
+		$gruppe = null
+	) {
 		$this->addMeta('ci_method', __FUNCTION__);
 		$this->addMeta('ci_params', array(
 			'studiensemester_kurzbz' => $studiensemester_kurzbz,
@@ -371,10 +498,14 @@ class Students extends FHCAPI_Controller
 		$this->fetchStudents($studiensemester_kurzbz, $studiengang_kz, $semester, $verband, $gruppe, null, null);
 	}
 
-	public function getStudentsOrgform($studiensemester_kurzbz,
-		$studiengang_kz, $orgform_kurzbz, $semester = null, $verband = null, $gruppe = null
-	)
-	{
+	public function getStudentsOrgform(
+		$studiensemester_kurzbz,
+		$studiengang_kz,
+		$orgform_kurzbz,
+		$semester = null,
+		$verband = null,
+		$gruppe = null
+	) {
 		$this->addMeta('ci_method', __FUNCTION__);
 		$this->addMeta('ci_params', array(
 			'studiensemester_kurzbz' => $studiensemester_kurzbz,
@@ -388,10 +519,12 @@ class Students extends FHCAPI_Controller
 		$this->fetchStudents($studiensemester_kurzbz, $studiengang_kz, $semester, $verband, $gruppe, null, $orgform_kurzbz);
 	}
 
-	public function getStudentsSpezialgruppe($studiensemester_kurzbz,
-		$studiengang_kz, $semester, $gruppe_kurzbz,
-		$orgform_kurzbz = null)
-	{
+	public function getStudentsSpezialgruppe(
+		$studiensemester_kurzbz,
+		$studiengang_kz,
+		$semester,
+		$gruppe_kurzbz
+	) {
 		$this->addMeta('ci_method', __FUNCTION__);
 		$this->addMeta('ci_params', array(
 			'studiensemester_kurzbz' => $studiensemester_kurzbz,
@@ -403,10 +536,13 @@ class Students extends FHCAPI_Controller
 		$this->fetchStudents($studiensemester_kurzbz, $studiengang_kz, $semester, null, null, $gruppe_kurzbz, null);
 	}
 
-	public function getStudentsOrgformSpezialgruppe($studiensemester_kurzbz,
-		$orgform_kurzbz, $studiengang_kz, $semester, $gruppe_kurzbz
-	)
-	{
+	public function getStudentsOrgformSpezialgruppe(
+		$studiensemester_kurzbz,
+		$orgform_kurzbz,
+		$studiengang_kz,
+		$semester,
+		$gruppe_kurzbz
+	) {
 		$this->addMeta('ci_method', __FUNCTION__);
 		$this->addMeta('ci_params', array(
 			'studiensemester_kurzbz' => $studiensemester_kurzbz,
@@ -430,8 +566,15 @@ class Students extends FHCAPI_Controller
 	 *
 	 * @return void
 	 */
-	protected function fetchStudents($studiensemester_kurzbz, $studiengang_kz, $semester = null, $verband = null, $gruppe = null, $gruppe_kurzbz = null, $orgform_kurzbz = null)
-	{
+	protected function fetchStudents(
+		$studiensemester_kurzbz,
+		$studiengang_kz,
+		$semester = null,
+		$verband = null,
+		$gruppe = null,
+		$gruppe_kurzbz = null,
+		$orgform_kurzbz = null
+	) {
 		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
 		$this->load->model('organisation/Studiensemester_model', 'StudiensemesterModel');
 
@@ -440,21 +583,6 @@ class Students extends FHCAPI_Controller
 			$this->terminateWithError($studiensemester_kurzbz . ' - ' . $this->p->t('lehre', 'error_noStudiensemester'));
 		}
 
-		/*
-			$this->PrestudentModel->addJoin('public.tbl_studiengang stg', 'studiengang_kz', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_person p', 'person_id');
-			$this->PrestudentModel->addJoin('public.tbl_student s', 'prestudent_id');
-			$this->PrestudentModel->addJoin('public.tbl_prestudentstatus pls', '
-				pls.status_kurzbz=public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.prestudent_id=tbl_prestudent.prestudent_id 
-				AND pls.studiensemester_kurzbz=public.get_stdsem_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.ausbildungssemester=public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)', 'LEFT');
-			$this->PrestudentModel->addJoin('lehre.tbl_studienplan sp', 'studienplan_id', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_benutzer b', 's.student_uid=b.uid');
-			$this->PrestudentModel->addJoin(
-				'public.tbl_studentlehrverband v',
-				'v.student_uid=s.student_uid AND v.studiensemester_kurzbz=' . $this->PrestudentModel->escape($studiensemester_kurzbz)
-			);*/
 		$this->prepareQuery($studiensemester_kurzbz, '');
 
 		$this->PrestudentModel->addSelect('v.semester');
@@ -462,18 +590,6 @@ class Students extends FHCAPI_Controller
 		$this->PrestudentModel->addSelect('v.gruppe');
 		$this->PrestudentModel->addSelect("'' AS priorisierung_relativ");
 
-		//add status per semester
-		$this->PrestudentModel->addSelect(
-			"(
-				SELECT status_kurzbz
-				FROM public.tbl_prestudentstatus pss
-				WHERE pss.prestudent_id = public.tbl_prestudent.prestudent_id
-				  AND pss.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
-				ORDER BY GREATEST(pss.datum, '0001-01-01') DESC
-				LIMIT 1
-				) AS statusofsemester"
-		);
-
 
 		$where = [];
 
@@ -506,7 +622,6 @@ class Students extends FHCAPI_Controller
 					false
 				);
 			}
-
 		}
 
 		$this->addFilter($studiensemester_kurzbz);
@@ -540,39 +655,18 @@ class Students extends FHCAPI_Controller
 
 		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
 
-		/*
-			$this->PrestudentModel->addJoin('public.tbl_studiengang stg', 'studiengang_kz', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_person p', 'person_id');
-			$this->PrestudentModel->addJoin('public.tbl_student s', 'prestudent_id', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_prestudentstatus pls', '
-				pls.status_kurzbz=public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.prestudent_id=tbl_prestudent.prestudent_id 
-				AND pls.studiensemester_kurzbz=public.get_stdsem_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.ausbildungssemester=public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)', 'LEFT');
-			$this->PrestudentModel->addJoin('lehre.tbl_studienplan sp', 'studienplan_id', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_benutzer b', 's.student_uid=b.uid', 'LEFT');
-			$this->PrestudentModel->addJoin(
-				'public.tbl_studentlehrverband v',
-				'v.student_uid=s.student_uid AND v.studiensemester_kurzbz=' . $this->PrestudentModel->escape($studiensemester_kurzbz),
-				'LEFT'
-			);*/
 		$this->prepareQuery($studiensemester_kurzbz);
 
-		$this->PrestudentModel->addSelect("COALESCE(v.semester::text, CASE WHEN public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') THEN public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)::text ELSE ''::text END) AS semester", false);
-		$this->PrestudentModel->addSelect('v.verband');
-		$this->PrestudentModel->addSelect('v.gruppe');
-
-		//add status per semester
-		$this->PrestudentModel->addSelect(
-			"(
-				SELECT status_kurzbz
-				FROM public.tbl_prestudentstatus pss
-				WHERE pss.prestudent_id = public.tbl_prestudent.prestudent_id
-				  AND pss.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
-				ORDER BY GREATEST(pss.datum, '0001-01-01') DESC
-				LIMIT 1
-				) AS statusofsemester"
-		);
+		$this->PrestudentModel->addSelect("COALESCE(
+			v.semester::text, 
+			CASE 
+				WHEN pls.status_kurzbz IN ('Aufgenommener', 'Bewerber', 'Wartender', 'interessent') 
+				THEN pls.ausbildungssemester::text 
+				ELSE ''::text 
+			END
+		) AS semester", false);
+		$this->PrestudentModel->addSelect("COALESCE(v.verband::text, ''::text)");
+		$this->PrestudentModel->addSelect("COALESCE(v.gruppe::text, ''::text)");
 
 		$this->addSelectPrioRel();
 
@@ -609,40 +703,12 @@ class Students extends FHCAPI_Controller
 
 		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
 
-		/*
-			$this->PrestudentModel->addJoin('public.tbl_studiengang stg', 'studiengang_kz', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_person p', 'person_id');
-			$this->PrestudentModel->addJoin('public.tbl_student s', 'prestudent_id');
-			$this->PrestudentModel->addJoin('public.tbl_prestudentstatus pls', '
-				pls.status_kurzbz=public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.prestudent_id=tbl_prestudent.prestudent_id 
-				AND pls.studiensemester_kurzbz=public.get_stdsem_prestudent(tbl_prestudent.prestudent_id, NULL) 
-				AND pls.ausbildungssemester=public.get_absem_prestudent(tbl_prestudent.prestudent_id, NULL)', 'LEFT');
-			$this->PrestudentModel->addJoin('lehre.tbl_studienplan sp', 'studienplan_id', 'LEFT');
-			$this->PrestudentModel->addJoin('public.tbl_benutzer b', 's.student_uid=b.uid');
-			$this->PrestudentModel->addJoin(
-				'public.tbl_studentlehrverband v',
-				'v.student_uid=s.student_uid AND v.studiensemester_kurzbz=' . $this->PrestudentModel->escape($studiensemester_kurzbz),
-				'LEFT'
-			);*/
 		$this->prepareQuery($studiensemester_kurzbz);
 
 		$this->PrestudentModel->addSelect('v.semester');
 		$this->PrestudentModel->addSelect('v.verband');
 		$this->PrestudentModel->addSelect('v.gruppe');
 
-		//add status per semester
-		$this->PrestudentModel->addSelect(
-			"(
-				SELECT status_kurzbz
-				FROM public.tbl_prestudentstatus pss
-				WHERE pss.prestudent_id = public.tbl_prestudent.prestudent_id
-				  AND pss.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
-				ORDER BY GREATEST(pss.datum, '0001-01-01') DESC
-				LIMIT 1
-				) AS statusofsemester"
-		);
-
 		$this->addSelectPrioRel();
 
 
@@ -681,33 +747,12 @@ class Students extends FHCAPI_Controller
 
 		$this->load->model('crm/Prestudent_model', 'PrestudentModel');
 
-		/*
-			$this->PrestudentModel->addJoin('public.tbl_person p', 'person_id');
-			$this->PrestudentModel->addJoin('public.tbl_student s', 'prestudent_id');
-			$this->PrestudentModel->addJoin('public.tbl_benutzer b', 's.student_uid=b.uid');
-			$this->PrestudentModel->addJoin(
-				'public.tbl_studentlehrverband v',
-				'v.student_uid=s.student_uid AND v.studiensemester_kurzbz=' . $this->PrestudentModel->escape($studiensemester_kurzbz),
-				'LEFT'
-			);*/
 		$this->prepareQuery($studiensemester_kurzbz);
 
 		$this->PrestudentModel->addSelect('v.semester');
 		$this->PrestudentModel->addSelect('v.verband');
 		$this->PrestudentModel->addSelect('v.gruppe');
 
-		//add status per semester
-		$this->PrestudentModel->addSelect(
-			"(
-				SELECT status_kurzbz
-				FROM public.tbl_prestudentstatus pss
-				WHERE pss.prestudent_id = public.tbl_prestudent.prestudent_id
-				  AND pss.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
-				ORDER BY GREATEST(pss.datum, '0001-01-01') DESC
-				LIMIT 1
-				) AS statusofsemester"
-		);
-
 		$this->addSelectPrioRel();
 
 		$this->addFilter($studiensemester_kurzbz);
@@ -771,6 +816,18 @@ class Students extends FHCAPI_Controller
 		// verband
 		// gruppe
 
+		//add status per semester
+		$this->PrestudentModel->addSelect(
+			"(
+				SELECT status_kurzbz
+				FROM public.tbl_prestudentstatus pss
+				WHERE pss.prestudent_id = public.tbl_prestudent.prestudent_id
+				  AND pss.studiensemester_kurzbz = " . $this->PrestudentModel->escape($studiensemester_kurzbz) . "
+				ORDER BY GREATEST(pss.datum, '0001-01-01') DESC
+				LIMIT 1
+				) AS statusofsemester"
+		);
+
 		$this->PrestudentModel->addSelect('UPPER(stg.typ || stg.kurzbz) AS studiengang');
 		$this->PrestudentModel->addSelect('tbl_prestudent.studiengang_kz');
 		$this->PrestudentModel->addSelect('stg.bezeichnung AS stg_bezeichnung');
@@ -806,13 +863,6 @@ class Students extends FHCAPI_Controller
 		$this->PrestudentModel->addSelect('mentor');
 		$this->PrestudentModel->addSelect('b.aktiv AS bnaktiv');
 
-		/*$this->PrestudentModel->addSelect('tbl_prestudent.reihungstest_id');
-		$this->PrestudentModel->addSelect('tbl_prestudent.anmeldungreihungstest');
-		$this->PrestudentModel->addSelect('tbl_prestudent.gsstudientyp_kurzbz');
-		$this->PrestudentModel->addSelect('tbl_prestudent.priorisierung');
-		$this->PrestudentModel->addSelect('p.zugangscode');
-		$this->PrestudentModel->addSelect('p.bpk');*/
-
 		$this->PrestudentModel->db->where_in('tbl_prestudent.studiengang_kz', $this->allowedStgs);
 
 		$this->PrestudentModel->addOrder('nachname');
@@ -827,13 +877,13 @@ class Students extends FHCAPI_Controller
 		$this->PrestudentModel->addSelect("(
 			SELECT count(*)
 			FROM (
-				SELECT *, public.get_rolle_prestudent(tbl_prestudent.prestudent_id, NULL) AS laststatus
-				FROM PUBLIC.tbl_prestudent pss
-				JOIN PUBLIC.tbl_prestudentstatus USING (prestudent_id)
+				SELECT *, public.get_rolle_prestudent(pss.prestudent_id, NULL) AS laststatus
+				FROM public.tbl_prestudent pss
+				JOIN public.tbl_prestudentstatus USING (prestudent_id)
 				WHERE person_id = p.person_id
 				AND studiensemester_kurzbz = (
 					SELECT studiensemester_kurzbz
-					FROM PUBLIC.tbl_prestudentstatus
+					FROM public.tbl_prestudentstatus
 					WHERE prestudent_id = tbl_prestudent.prestudent_id
 					AND status_kurzbz = 'Interessent'
 					LIMIT 1
@@ -842,7 +892,7 @@ class Students extends FHCAPI_Controller
 			) prest
 			WHERE laststatus NOT IN ('Abbrecher', 'Abgewiesener', 'Absolvent')
 			AND priorisierung <= tbl_prestudent.priorisierung
-		) || ' (' || tbl_prestudent.priorisierung || ')' AS priorisierung_relativ", false);
+		) || ' (' || COALESCE(tbl_prestudent.priorisierung::text, ' '::text) || ')' AS priorisierung_relativ", false);
 	}
 
 	/**