Wie füge ich in einer MySQL-Abfrage einen Tag zum DATETIME-Feld hinzu?

mysql> Select StudentName, RegDate, Date_ADD(RegDate, INTERVAL +1 day) AS 'NEXT DAY'
       from testing where StudentName = 'gaurav';

+-------------+---------------------+---------------------+
| StudentName | RegDate             | NEXT DAY            |
+-------------+---------------------+---------------------+
| Gaurav      | 2017-10-29 08:48:33 | 2017-10-30 08:48:33 |
+-------------+---------------------+---------------------+
1 row in set (0.00 sec)