MySql 数据类型 smallint 怎么显示为 smallint(6)
mysql> create table sales_quantity (
-> employee char(6) references employee,
-> product char(6) references products,
-> quantity smallint );
Query OK, 0 rows affected (0.00 sec)

mysql> show tables;
+-----------------+
| Tables_in_sales |
+-----------------+
| employee |
| products |
| sales_quantity |
+-----------------+
3 rows in set (0.00 sec)

mysql> desc sales_quantity;
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| employee | char(6) | YES | | NULL | |
| product | char(6) | YES | | NULL | |
| quantity | smallint(6) | YES | | NULL | |
+----------+-------------+------+-----+---------+-------+
3 rows in set (0.00 sec)

mysql>

如上的步骤啊, 怎么指定数据类型明明是 smallint, 结果显示却为 smallint(6)???

有什么影响吗?

MySQL
[解决办法]
没什么影响，那个6是指定显示的宽度，不影响你使用的
别管它就好了