mysql int 1_mysql int(1) 与 tinyint(1) 区别
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> se
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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