MySQL创建不起作用错误1064

Question

我有这个问题：

CREATE TABLE
    `rooms` (
    `roomname` VARCHAR NOT NULL PRIMARY KEY,
    `price` DOUBLE NOT NULL
)
ENGINE = MyISAM";

但它不起作用我收到此错误：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'NOT NULL PRIMARY KEY, `price` DOUBLE NOT NULL ) ENGINE = MyISAM"' at line 3

这里有什么问题？

Answer 1

CREATE TABLE
    `rooms` (
    `roomname` VARCHAR(20) NOT NULL PRIMARY KEY,
    `price` DOUBLE NOT NULL
)
ENGINE = MyISAM";

您需要指定长度

Answer 2

是的，您需要指定VARCHAR（长度）。长度决定了您可以用作房间名称的字符数。