mysql5.7基础 insert 表中含有自动增长的字段，插入数据时用NULL

mysql> desc t2;
+-------+-------------+------+-----+---------+----------------+
| Field | Type        | Null | Key | Default | Extra          |
+-------+-------------+------+-----+---------+----------------+
| id    | int(11)     | NO   | PRI | NULL    | auto_increment |
| name  | varchar(10) | YES  |     | NULL    |                |
+-------+-------------+------+-----+---------+----------------+
2 rows in set (0.00 sec)

mysql> insert into t2 (id,name) values(1,‘hello‘);
Query OK, 1 row affected (0.00 sec)

mysql> insert into t2 (id,name) values(null,‘world‘);
Query OK, 1 row affected (0.00 sec)

mysql> select * from t2;
+----+-------+
| id | name  |
+----+-------+
|  1 | hello |
|  2 | world |
+----+-------+
2 rows in set (0.00 sec)

mysql>