MySQL 布尔值“tinyint(1)”是否最多支持 127？

The maximum value for tinyint is= (2(8-1)-1) = 127
The minimum value for tinyint is = -(2(8-1)) = -128.

mysql> create table Display
   -> (
   -> rangeOfId tinyint(1)
   -> );
Query OK, 0 rows affected (0.67 sec)

mysql> insert into Display values(128);
ERROR 1264 (22003): Out of range value for column 'rangeOfId' at row 1

mysql> insert into Display values(127);
Query OK, 1 row affected (0.18 sec)

mysql> insert into Display values(-128);
Query OK, 1 row affected (0.20 sec)

mysql> select *from Display;

+-----------+
| rangeOfId |
+-----------+
|       127 |
|      -128 |
+-----------+
2 rows in set (0.00 sec)