mysql - 我无法添加外键约束？ mysql

Question

我无法创建第二个表，因为 Mysql 打印出错误代码 12 15 的消息，但我不明白脚本中的问题是什么。

我有两张 table :

CREATE TABLE IF NOT EXISTS `tsmdb_centralized`.`customer_accounts` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `customerAccountName` VARCHAR(50) NOT NULL,
  `customerAccountUser` VARCHAR(50) NOT NULL,
  `customerAccountServer` VARCHAR(45) NOT NULL,
  `password` VARCHAR(20) NOT NULL,
  `status` TINYINT(50) NOT NULL,
  PRIMARY KEY (`id`, `customerAccountServer`))
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8;


-- -----------------------------------------------------
-- Table `tsmdb_centralized`.`bugs_etl`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `tsmdb_centralized`.`bugs_etl` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `bug_title` VARCHAR(45) NOT NULL,
  `bug_description` VARCHAR(500) NULL,
  `customerAccountServer` VARCHAR(45) NOT NULL,
  PRIMARY KEY (`id`),
  INDEX `fk_bugs_etl_customer_accounts_idx` (`customerAccountServer` ASC),
  CONSTRAINT `fk_bugs_etl_customer_accounts`
    FOREIGN KEY (`customerAccountServer`)
    REFERENCES `tsmdb_centralized`.`customer_accounts` (`customerAccountServer`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8;

Answer 1

我发现错误，您想要获取外键“CustomerAccountServer”varchar(50)，并且只能有一个引用唯一字段的外键。修改您的 customer_accounts 表，使 customeraccountServer 字段是唯一的。

CREATE TABLE IF NOT EXISTS `tsmdb_centralized`.`customer_accounts` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`customerAccountName` VARCHAR(50) NOT NULL,
`customerAccountUser` VARCHAR(50) NOT NULL,
`customerAccountServer` VARCHAR(45) NOT NULL,
`password` VARCHAR(20) NOT NULL,
`status` TINYINT(50) NOT NULL,
PRIMARY KEY (`id`, `customerAccountServer`),
UNIQUE KEY `customerAccountServer_UNIQUE` (`customerAccountServer`))
ENGINE = InnoDB
DEFAULT CHARACTER SET = utf8;