Question

mysql查询

CREATE TABLE IF NOT EXISTS 'sadakin'.'gcm_users' (

     'id' int( 11 ) NOT NULL AUTO_INCREMENT ,
     'gcm_regid' text,
     'name' varchar( 50 ) NOT NULL ,
     'email' varchar( 255 ) NOT NULL ,
     'imei' varchar( 20 ) NOT NULL ,
     'created_at' timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ,
     PRIMARY KEY ( 'id' ) ,
     KEY 'imei' ( 'imei' ) 
    ) ENGINE = InnoDB DEFAULT CHARSET = latin1 AUTO_INCREMENT =1;

错误消息：

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 ''sadakin'.'gcm_users' (

      'id' int( 11 ) NOT NULL AUTO_INCREMENT ,
          'gcm_' at line 1

我没有发现错误。救救我！

Answer 1

使用反引号括起标识符。报价只是字符串：

CREATE TABLE IF NOT EXISTS `sadakin`.`gcm_users` (

         `id` int( 11 ) NOT NULL AUTO_INCREMENT ,
         `gcm_regid` text,
         `name` varchar( 50 ) NOT NULL ,
         `email` varchar( 255 ) NOT NULL ,
         `imei` varchar( 20 ) NOT NULL ,
         `created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ,
         PRIMARY KEY ( `id` ) ,
         KEY `imei` ( `imei` ) 
        ) ENGINE = InnoDB DEFAULT CHARSET = latin1 AUTO_INCREMENT =1;

Answer 2

列名称上不需要任何单引号

CREATE TABLE IF NOT EXISTS sadakin.gcm_users (

         id int( 11 ) NOT NULL AUTO_INCREMENT ,
         gcm_regid text,
         name varchar( 50 ) NOT NULL ,
         email varchar( 255 ) NOT NULL ,
         imei varchar( 20 ) NOT NULL ,
         created_at timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ,
         PRIMARY KEY ( id ) ,
         KEY imei ( imei ) 
        ) ENGINE = InnoDB DEFAULT CHARSET = latin1 AUTO_INCREMENT =1;

Answer 3

您必须使用反向标记而不是单引号。引号用于字符串文字。

请检查：http://dev.mysql.com/doc/refman/5.0/en/string-literals.html

字符串是一个字节或字符序列，包含在其中单引号（“＆＃39;”）或双引号（“＆＃34;”）

尝试：

CREATE TABLE IF NOT EXISTS `sadakin`.`gcm_users` (

     `id` INT( 11 ) NOT NULL AUTO_INCREMENT ,
     `gcm_regid` TEXT,
     `name` VARCHAR( 50 ) NOT NULL ,
     `email` VARCHAR( 255 ) NOT NULL ,
     `imei` VARCHAR( 20 ) NOT NULL ,
     `created_at` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ,
     PRIMARY KEY ( `id` ) ,
     KEY `imei` ( `imei` ) 
    ) ENGINE = INNODB DEFAULT CHARSET = latin1 AUTO_INCREMENT =1;

mysql语法错误为什么？

3 个答案: