MySQL Workbench 创建表时出现错误 1064

Question

我尝试将 MySQL Workbench 8.0.3 与 MariaDB 一起使用，但出现以下错误:

Executing:

CREATE TABLE `mydb`.`customer` (

  `ID` INT UNIQUE UNSIGNED NOT NULL AUTO_INCREMENT,

  `Name` VARCHAR(255) NOT NULL,

  `Email` VARCHAR(255) CHARACTER SET 'utf8' NOT NULL,

  `Street` VARCHAR(255) CHARACTER SET 'utf8' COLLATE 'utf8_czech_ci' NOT NULL,

  `City` VARCHAR(255) CHARACTER SET 'utf8' COLLATE 'utf8_czech_ci' NOT NULL,

  PRIMARY KEY (`ID`));


ERROR 1064: You have an error in your SQL syntax; check the manual that     
corresponds to your MariaDB server version for the right syntax to use near 'UNSIGNED NOT NULL AUTO_INCREMENT,
  `Name` VARCHAR(255) NOT NULL,
  `Email` VARC' at line 2
SQL Statement:
CREATE TABLE `mydb`.`customer` (
  `ID` INT UNIQUE UNSIGNED NOT NULL AUTO_INCREMENT,
  `Name` VARCHAR(255) NOT NULL,
  `Email` VARCHAR(255) CHARACTER SET 'utf8' NOT NULL,
  `Street` VARCHAR(255) CHARACTER SET 'utf8' COLLATE 'utf8_czech_ci' NOT NULL,
  `City` VARCHAR(255) CHARACTER SET 'utf8' COLLATE 'utf8_czech_ci' NOT NULL,
  PRIMARY KEY (`ID`))


Operation failed: There was an error while applying the SQL script to the database.

您在上面看到的代码是使用“创建表”工作台功能生成的。

Answer 1

UNSIGNED 和 INT 一起使用，所以这是有效的:

`ID` INT  UNSIGNED UNIQUE NOT NULL AUTO_INCREMENT,

这更短:

`ID` INT  UNSIGNED AUTO_INCREMENT PRIMARY KEY,

主键已经是非NULL且唯一。无需两次声明这些属性。