Question

我到处都看过这个错误，并阅读了大量可能的解决方案，但我仍然无法弄清楚我的脚本有什么问题。

在服务器

中执行SQL脚本

错误：错误1215：无法添加外键约束

SQL代码：

    -- -----------------------------------------------------
    -- Table `mydb`.`MARINE`
    -- -----------------------------------------------------
    CREATE TABLE IF NOT EXISTS `mydb`.`MARINE` (
      `EDIPI` DECIMAL(10) NOT NULL,
      `LastName` VARCHAR(25) NOT NULL,
      `FirstName` VARCHAR(25) NOT NULL,
      `MiddleInitial` CHAR(1) NULL,
      `Rank` VARCHAR(6) NOT NULL,
      `MOS` DECIMAL(4) NOT NULL,
      `BATTLE_SPACE_Company` CHAR(1) NOT NULL,
      `BATTLE_SPACE_Section/Platoon` VARCHAR(2) NOT NULL,
      PRIMARY KEY (`EDIPI`),
      INDEX `fk_MARINE_BATTLE_SPACE1_idx` (`BATTLE_SPACE_Company` ASC, `BATTLE_SPACE_Section/Platoon` ASC),
      CONSTRAINT `fk_MARINE_BATTLE_SPACE1`
        FOREIGN KEY (`BATTLE_SPACE_Company` , `BATTLE_SPACE_Section/Platoon`)
        REFERENCES `mydb`.`BATTLE_SPACE` (`Company` , `Section/Platoon`)
        ON DELETE NO ACTION
        ON UPDATE NO ACTION)
    ENGINE = InnoDB

SQL脚本执行完成：语句：7成功，1失败

以最终形式获取视图定义。没什么可取的

CREATE TABLE `battle_space` (
  `Company` char(1) NOT NULL,
  `Location` varchar(20) NOT NULL,
  `Section/Platoon` varchar(2) NOT NULL,
  PRIMARY KEY (`Company`,`Location`,`Section/Platoon`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8

Answer 1

有几个问题。

在 MARINE 表格定义中包含 DEFAULT CHARSET = utf8; 。
您需要外键中的列 同一订单 父表。

username@mydb[temp]>CREATE TABLE battle_space ( Company char(1) NOT NULL, Location varchar(20) NOT NULL, Section varchar(2) NOT NULL, PRIMARY KEY (Company,Location,Section) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; Query OK, 0 rows affected (0.02 sec)

username@mydb[temp]>CREATE TABLE IF NOT EXISTS MARINE ( EDIPI DECIMAL(10) NOT NULL, LastName VARCHAR(25) NOT NULL, FirstName VARCHAR(25) NOT NULL, MiddleInitial CHAR(1) NULL, Rank VARCHAR(6) NOT NULL, MOS DECIMAL(4) NOT NULL, BATTLE_SPACE_Company CHAR(1) NOT NULL, BATTLE_SPACE_Section VARCHAR(2) NOT NULL, Location VARCHAR(20) NOT NULL, PRIMARY KEY (EDIPI), INDEX fk_MARINE_BATTLE_SPACE1_idx (BATTLE_SPACE_Company ASC , BATTLE_SPACE_Section ASC , Location), CONSTRAINT fk_MARINE_BATTLE_SPACE1 FOREIGN KEY (BATTLE_SPACE_Company , Location , BATTLE_SPACE_Section) REFERENCES battle_space (Company , Location , Section) ON DELETE NO ACTION ON UPDATE NO ACTION ) ENGINE=INNODB DEFAULT CHARSET=UTF8; Query OK, 0 rows affected (0.02 sec)

MySQL错误1215：无法添加外键约束

1 个答案: