diff --git a/misc/clear_entries_for_participant.sql b/misc/clear_entries_for_participant.sql
new file mode 100644
index 0000000..9f33a37
--- /dev/null
+++ b/misc/clear_entries_for_participant.sql
@@ -0,0 +1,23 @@
+DELETE FROM times WHERE
+times.shipcall_id IN
+(
+	SELECT s.id FROM shipcall s
+    JOIN shipcall_participant_map spm ON s.id = spm.shipcall_id
+    JOIN participant p ON spm.participant_id = p.id
+    WHERE p.id = 10
+);
+
+DELETE `history` FROM `history`
+JOIN shipcall s on `history`.shipcall_id = s.id
+JOIN shipcall_participant_map spm ON s.id = spm.shipcall_id
+WHERE spm.participant_id = 10;
+
+-- damit das hier funktioniert muss der FK in shipcall_participant_map von "RESTRICT" auf "SET NULL" 
+-- geändert werden
+
+DELETE shipcall FROM shipcall
+INNER JOIN shipcall_participant_map spm ON shipcall.id = spm.shipcall_id
+JOIN participant p ON spm.participant_id = p.id
+WHERE p.id = 10;
+
+DELETE FROM shipcall_participant_map WHERE participant_id = 10;
\ No newline at end of file