MySQL의 UNSIGNED 열에 음수 값을 삽입하면 어떻게 되나요?

mysql> create table UnsignedDemo
   -> (
   -> Id int UNSIGNED
   -> );
Query OK, 0 rows affected (0.79 sec)

mysql> INSERT INTO UnsignedDemo VALUES(-100);
ERROR 1264 (22003): Out of range value for column 'Id' at row 1

mysql> INSERT INTO UnsignedDemo VALUES(100);
Query OK, 1 row affected (0.15 sec)
mysql> INSERT INTO UnsignedDemo VALUES(1000);
Query OK, 1 row affected (0.15 sec)
mysql> INSERT INTO UnsignedDemo VALUES(0);
Query OK, 1 row affected (0.11 sec)
mysql> INSERT INTO UnsignedDemo VALUES(100000000);
Query OK, 1 row affected (0.27 sec)

mysql> SELECT *FROM UnsignedDemo;

+-----------+
| Id        |
+-----------+
|       100 |
|      1000 |
|         0 |
| 100000000 |
+-----------+
4 rows in set (0.00 sec)