diff --git a/misc/clear_data.sql b/misc/clear_data.sql
new file mode 100644
index 0000000..a85595c
--- /dev/null
+++ b/misc/clear_data.sql
@@ -0,0 +1,11 @@
+use bremen_calling_test;
+
+DELETE FROM notification WHERE id > 0;
+
+DELETE FROM history WHERE id > 0;
+
+DELETE FROM shipcall_participant_map WHERE id > 0;
+
+DELETE FROM times WHERE id > 0;
+
+DELETE FROM shipcall WHERE id > 0;
\ No newline at end of file