MySQL参考手册没有提供一个明确的例子来说明如何做到这一点.
我有一个国家名称的枚举类型列,需要添加更多国家.实现这一点的正确MySQL语法是什么?
以下是我的try :
ALTER TABLE carmake CHANGE country country ENUM('Sweden','Malaysia');
我得到的错误是:ERROR 1265 (01000): Data truncated for column 'country' at row 1.
country
列是上述语句中的枚举类型列.
显示创建表格输出:
mysql> SHOW CREATE TABLE carmake;
+---------+---------------------------------------------------------------------+
| Table | Create Table
+---------+---------------------------------------------------------------------+
| carmake | CREATE TABLE `carmake` (
`carmake_id` tinyint(4) NOT NULL AUTO_INCREMENT,
`name` tinytext,
`country` enum('Japan','USA','England','Australia','Germany','France','Italy','Spain','Czech Republic','China','South Korea','India') DEFAULT NULL,
PRIMARY KEY (`carmake_id`),
KEY `name` (`name`(3))
) ENGINE=InnoDB AUTO_INCREMENT=49 DEFAULT CHARSET=latin1 |
+---------+---------------------------------------------------------------------+
1 row in set (0.00 sec)
从carmake输出中 Select 不同的国家:
+----------------+
| country |
+----------------+
| Italy |
| Germany |
| England |
| USA |
| France |
| South Korea |
| NULL |
| Australia |
| Spain |
| Czech Republic |
+----------------+