diff --git a/update_db.py b/update_db.py
index 0551daa..168be1e 100644
--- a/update_db.py
+++ b/update_db.py
@@ -29,7 +29,11 @@ def update_video_table (
         video_dao,
         api_data:   list[dict],
 ) -> None:
-    videos = video_dao.fetch_all ()
+    # TODO: 書くこと
+
+    video_dao.upsert_all (videos)
+
+    video_dao.delete_nonexistent_data (video_id_list)
 
     # TODO: 書くこと
 
@@ -42,7 +46,7 @@ def fetch_comments (
 
     action_track_id = (
             ''.join (random.choice (string.ascii_letters + string.digits)
-                     for _ in range (10))
+                     for _ in range (10)) 
             + '_'
             + str (random.randrange (10 ** 12, 10 ** 13)))