diff --git a/db/20190505191006-comment-count-decrease.sql b/db/20190505191006-comment-count-decrease.sql
new file mode 100644
index 0000000..46e963d
--- /dev/null
+++ b/db/20190505191006-comment-count-decrease.sql
@@ -0,0 +1,13 @@
+-- This trigger is called every time a comment is deleted, so the comment count for the page where the comment belong is updated
+CREATE OR REPLACE FUNCTION commentsDeleteTriggerFunction() RETURNS TRIGGER AS $trigger$
+BEGIN
+  UPDATE pages
+  SET commentCount = commentCount - 1
+  WHERE domain = old.domain AND path = old.path;
+
+  DELETE FROM comments
+  WHERE parentHex = old.commentHex;
+
+  RETURN NEW;
+END;
+$trigger$ LANGUAGE plpgsql;