    public static function remove_all($object_type, $object_id)
    {
        global $DB;
        global $website;

        $DB->execute('
            DELETE FROM nv_notes
                WHERE website = '.protect($website->id).'
                  AND item_type = '.protect($object_type).'
                  AND item_id = '.protect($object_id).'
                LIMIT 1'
        );

        return 'true';
    }

The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.