diff --git a/module/sos/sos_lab_stg_reset_tid_stg/reset_sos_lab_stg_tid_stg.sql b/module/sos/sos_lab_stg_reset_tid_stg/reset_sos_lab_stg_tid_stg.sql
new file mode 100644
index 0000000..6899886
--- /dev/null
+++ b/module/sos/sos_lab_stg_reset_tid_stg/reset_sos_lab_stg_tid_stg.sql
@@ -0,0 +1,166 @@
+
+--Wenn es bei archivierten Daten Verweise in sos_lab_stg.tid_stg auf 
+--Nummern gibt, die es in lehr_stg_ab nicht gibt,
+--können Sie mit diesem SQL die tid_stg zurücksetzen
+
+--Im Ergebnis darf der SQL:
+-- select distinct tid_stg from sos_lab_stg where stichtag=4
+-- and tid_stg not in (select tid from lehr_stg_ab)
+-- order by 1;
+--keinen Datensatz liefern
+
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach_stg = L.stg
+    AND sos_lab_stg.ch39_vertief_stg = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss_stg = L.abschluss
+    AND sos_lab_stg.pversion_stg = L.pversion
+    AND sos_lab_stg.schwerpunkt_stg = L.schwerpunkt
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach_stg
+    AND L.stort = sos_lab_stg.stort
+    AND L.stutyp = sos_lab_stg.stutyp
+);
+
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach_stg = L.stg
+    AND sos_lab_stg.ch39_vertief_stg = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss_stg = L.abschluss
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach_stg
+    AND L.stort = sos_lab_stg.stort
+    AND L.stutyp = sos_lab_stg.stutyp
+)
+WHERE tid_stg IS NULL;
+
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach_stg = L.stg
+    AND sos_lab_stg.ch39_vertief_stg = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss_stg = L.abschluss
+    AND sos_lab_stg.pversion_stg = L.pversion
+    AND sos_lab_stg.schwerpunkt_stg = L.schwerpunkt
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach_stg
+    AND L.stutyp = sos_lab_stg.stutyp
+)
+WHERE tid_stg IS NULL;
+
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach_stg = L.stg
+    AND sos_lab_stg.ch39_vertief_stg = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss_stg = L.abschluss
+    AND sos_lab_stg.schwerpunkt_stg = L.schwerpunkt
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach_stg
+    AND L.stutyp = sos_lab_stg.stutyp
+)
+WHERE tid_stg IS NULL;
+
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach_stg = L.stg
+    AND sos_lab_stg.ch39_vertief_stg = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss_stg = L.abschluss
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach_stg
+    AND L.stutyp = sos_lab_stg.stutyp
+    )
+WHERE tid_stg IS NULL;
+
+--jetzt ohne stutyp:
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach_stg = L.stg
+    AND sos_lab_stg.ch39_vertief_stg = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss_stg = L.abschluss
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach_stg
+    --AND L.stutyp = sos_lab_stg.stutyp
+    )
+WHERE tid_stg IS NULL;
+
+-- wenn Studiengang des Studierenden nicht ermittelt werden kann,
+-- nehmen wir als fallback die Angaben der Prüfung:
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach = L.stg
+    AND sos_lab_stg.ch39_vertief = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss = L.abschluss
+    AND sos_lab_stg.pversion = L.pversion
+    AND sos_lab_stg.schwerpunkt = L.schwerpunkt
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach
+    AND L.stutyp = sos_lab_stg.stutyp
+    )
+WHERE tid_stg IS NULL;
+
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach = L.stg
+    AND sos_lab_stg.ch39_vertief = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss = L.abschluss
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach
+    AND L.stutyp = sos_lab_stg.stutyp
+    )
+WHERE tid_stg IS NULL;
+
+--jetzt ohne stutyp:
+UPDATE sos_lab_stg
+SET tid_stg = (
+  SELECT min(tid)
+  FROM
+    lehr_stg_ab L
+  WHERE
+    sos_lab_stg.ch30_fach = L.stg
+    AND sos_lab_stg.ch39_vertief = L.vertfg
+    AND sos_lab_stg.ch35_ang_abschluss = L.abschluss
+    AND L.semester_von <= sos_lab_stg.sem_der_pruefung
+    AND L.semester_bis >= sos_lab_stg.sem_der_pruefung
+    AND L.kz_fach = sos_lab_stg.kz_fach
+    --AND L.stutyp = sos_lab_stg.stutyp
+    )
+WHERE tid_stg IS NULL;
diff --git a/module/sos/studierende_loeschen/studierende_loeschen.sql b/module/sos/studierende_loeschen/studierende_loeschen.sql
new file mode 100644
index 0000000..63279ae
--- /dev/null
+++ b/module/sos/studierende_loeschen/studierende_loeschen.sql
@@ -0,0 +1,13 @@
+--freemarker template
+--Lösche Teststudenten:
+<#assign mtknr="9991,9992,9993,9994,9995,9996,9997,9998,9999,203508,203510,203514,376677,379874,386001,386006,404376" />
+
+
+delete from sos_sos where matrikel_nr in (${mtknr});
+delete from sos_stg where matrikel_nr in (${mtknr});
+delete from sos_stg_aggr where matrikel_nr in (${mtknr});
+delete from sos_lab where matrikel_nr in (${mtknr});
+delete from sos_lab_stg where matrikel_nr in (${mtknr});
+delete from sos_stg_verlauf where matrikel_nr in (${mtknr});
+
+