创建表时出错：您的SQL语法中出现错误'order（order_id INT UNSIGNED NOT NULL AUTO_INCREMENT，user_id'在第1行[duplicate]

Question

这个问题在这里已有答案：

• Syntax error due to using a reserved word as a table or column name in MySQL 1回答

我试图用PHP脚本在同一个MySQL数据库中创建2个表：表'user'主键'user_id'和表'order'主键'order_id'和外键'user_id'来自'user'表（1对多关系）。

表用户成功创建没有问题：

$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

已经检查了语法，找不到错误。你能告诉我出了什么问题吗？非常感谢。

Answer 1

你需要像reserved words一样用反引号逃脱order

CREATE TABLE `order` ( ...

或者更好地使用其他名称。

Answer 2

order是mysql使用的关键字（从id ASC中选择tbl_name顺序）所以为了逃避使用关键字你必须使用引号``来避免我的sql错误

所以你的查询应该由

$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";

享受：D