mysql> insert into comments set comments = 'foo';
Query OK, 1 row affected (0.00 sec)

mysql> select id from comments;
+----+
| id |
+----+
|  1 |
|  2 |
|  3 |
|  4 |
|  5 |
|  6 |
|  7 |
|  8 |
|  9 |
| 10 |
| 11 |
| 12 |
| 38 |
| 39 |
| 59 | <--- RECORD CREATED SUCCESSFULLY
+----+
15 rows in set (0.00 sec)

mysql> delete from comments where id = 59;
Query OK, 1 row affected (0.01 sec)