在没有给出列名和值的情况下运行 INSERT INTO 语句时 MySQL 返回什么？

mysql> Create table Student(RollNO INT, Name Varchar(20), Class Varchar(15));
Query OK, 0 rows affected (0.17 sec)

mysql> Insert into Student() Values();
Query OK, 1 row affected (0.02 sec)

mysql> Select * from Student;

+--------+------+-------+
| RollNO | Name | Class |
+--------+------+-------+
| NULL   | NULL | NULL  |
+--------+------+-------+

1 row in set (0.00 sec)

mysql> Insert into Student() Values();
Query OK, 1 row affected (0.03 sec)

mysql> Select * from Student;

+--------+------+-------+
| RollNO | Name | Class |
+--------+------+-------+
| NULL   | NULL | NULL  |
| NULL   | NULL | NULL  |
+--------+------+-------+

2 rows in set (0.00 sec)