mysql> create table testint(id int(1), col2 tinyint(1));

Query OK, 0 rows affected (0.06 sec)

mysql> insert into testint values(256, 257);

Query OK, 1 row affected, 1 warning (0.03 sec)

mysql> select * from testint;

+------+------+

| id | col2 |

+------+------+

| 256 | 127 |

+------+------+

1 row in set (0.02 sec)

mysql> insert into testint values(336, 257);

Query OK, 1 row affected, 1 warning (0.02 sec)

mysql> select * from testint;

+------+------+

| id | col2 |

+------+------+

| 256 | 127 |

| 336 | 127 |

+------+------+

2 rows in set (0.00 sec)

mysql> insert into testint values(336, 255);

Query OK, 1 row affected, 1 warning (0.03 sec)

mysql> select * from testint;

+------+------+

| id | col2 |

+------+------+

| 256 | 127 |

| 336 | 127 |

| 336 | 127 |

+------+------+

3 rows in set (0.00 sec)

mysql>

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