创建MySql表时出错

Question

I am trying to create a table from my command line ( Debian ), but it keeps saying I have an error in my syntax. To me it looks fine and I have got it checked by 2 different people who also cannot find the issue.

CREATE TABLE users (
   id INT(6) UNSIGNED AUTO_INCREMENT, 
   uuid VARCHAR(32) NOT NULL, 
   key VARCHAR(50) NOT NULL
);

One guy said remove NOT NULL but I still had the same issue.

Answer 1

KEY is a reserved word try change with my_key

 CREATE TABLE users (id INT( 6) UNSIGNED AUTO_INCREMENT, 
      uuid VARCHAR(32) NOT NULL, 
     my_key VARCHAR(50) NOT NULL,
     PRIMARY KEY (`id`));

Answer 2

Sorry,

for an AUTO_INCREMENT Field you MUST have a key on this COLUMN.

So this works:

CREATE TABLE `user` (
  `id` int(6) unsigned NOT NULL AUTO_INCREMENT,
  `uuid` varchar(32) DEFAULT NULL,
  `key` varchar(50) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

Answer 3

MySQL has lots of reserved keywords that cannot be used as column names. Here you are using key as a column name, and since it is a reserved keyword in MySQL, you need to change the name of the column to something that is not a reserved keyword.

You can find a full list of reserved keywords that cannot be used as a column name here .

Answer 4

The column name "key" you used for the third column is a reserved word, all you have to do is change the name.

Well, one probably can't know all the existing keywords in a programming language but one can help himself/herself by using colour-code enabled text editor or Integrated Development Environment (IDE) when writing codes. It helps a lot.