什么导致此MySQL查询中的语法错误？

Question

为什么我从这里得到一个错误？

 

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 'read, compose, reply, moderate FROM article_permissions' at line 2 

 
SELECT 
permission_id, category_id, group_id, read, compose, reply, moderate 
FROM article_permissions 
WHERE category_id = 6 
    AND group_id = 0 
ORDER BY permission_id DESC 
LIMIT 1 

这是表：

 
CREATE TABLE IF NOT EXISTS `article_permissions` (
    `permission_id` int(15) NOT NULL AUTO_INCREMENT, 
    `category_id` int(15) NOT NULL, 
    `group_id` int(15) NOT NULL, 
    `read` tinyint(1) NOT NULL, 
    `compose` tinyint(1) NOT NULL, 
    `reply` tinyint(1) NOT NULL, 
    `moderate` tinyint(1) NOT NULL, 
    PRIMARY KEY (`permission_id`) 
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=2 ; 

Answer 1

read是MySQL的一个reserved word。要将它用作查询中的列名，请将其置于反引号内（如同在表创建语句中一样）。

SELECT 
`permission_id`, `category_id`, `group_id`, `read`, `compose`, `reply`, `moderate` 
FROM article_permissions 
WHERE `category_id` = 6 
    AND `group_id` = 0 
ORDER BY `permission_id` DESC 
LIMIT 1 

（如果启用了ANSI_QUOTES option，你可以用双引号代替，这是更便携。）