我正在尝试使用PHP脚本在同一MySQL数据库中创建2个表:具有主键“ user_id”的表“ user”和具有主键“ order_id”和来自“ user”的外键“ user_id”的表“ order”表(一对多关系)。表用户创建成功,没有问题:$sql="CREATE TABLE user( user_id INT UNSIGNED NOT NULL AUTO_INCREMENT, type ENUM('member','admin') NOT NULL, username VARCHAR(30) NOT NULL, email VARCHAR(80) NOT NULL, pass VARBINARY(32) NOT NULL, first_name VARCHAR(40) NOT NULL, last_name VARCHAR(40) NOT NULL, date_expires DATE NOT NULL, date_created TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, date_modified TIMESTAMP NOT NULL DEFAULT '0000-00-00 00:00:00', PRIMARY KEY (user_id), UNIQUE (username), UNIQUE (email) )ENGINE=InnoDB DEFAULT CHARSET=utf8";但是,我无法创建表顺序:$sql="CREATE TABLE order( order_id INT UNSIGNED NOT NULL AUTO_INCREMENT, user_id INT UNSIGNED NOT NULL, transaction_id VARCHAR(19) NOT NULL, payment_status VARCHAR(15) NOT NULL, payment_amount DECIMAL(6,2) UNSIGNED NOT NULL, payment_date_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY (order_id), FOREIGN KEY (user_id) REFERENCES user (user_id) )ENGINE=InnoDB DEFAULT CHARSET=utf8";我收到以下错误:Error creating table: 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 'order( order_id INT UNSIGNED NOT NULL AUTO_INCREMENT, user_id ' at line 1已经检查语法,找不到错误。您能告诉我出什么问题了吗?非常感谢。
2 回答
GCT1015
TA贡献1827条经验 获得超4个赞
order是mysql所使用的关键字,例如(从tbl_name中按id ASC进行选择),为了避免使用关键字,您必须使用引号``以避免我的sql错误
所以你的查询应该
$sql="CREATE TABLE `order` (
order_id INT UNSIGNED NOT NULL AUTO_INCREMENT,
user_id INT UNSIGNED NOT NULL,
transaction_id VARCHAR(19) NOT NULL,
payment_status VARCHAR(15) NOT NULL,
payment_amount DECIMAL(6,2) UNSIGNED NOT NULL,
payment_date_time TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (order_id),
FOREIGN KEY (user_id) REFERENCES user (user_id)
)ENGINE=InnoDB DEFAULT CHARSET=utf8";
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