mysql工作台错误代码1215 : can't add foreign key constraint

Question

我确信我已经遵循了其他帖子中的答案，但我的代码仍然是错误的。我不知道如何将外键添加到我的表中。我也遵循了教程网站上给出的说明。

DROP TABLE IF EXISTS `Spatuala` ;

CREATE TABLE IF NOT EXISTS `Spatuala`(
    `idSpatula` INT NOT NULL,
    `ProductName` VARCHAR(50) NULL,
    `Type` ENUM('Food', 'Drugs', 'Paints', 'Plaster') NOT NULL,
    `Size` VARCHAR(50),
    `Colour` VARCHAR(50),
    `Price` DECIMAL(10,2),
    `QuantityInStock` INT NOT NULL,
    PRIMARY KEY (`idSpatula`))
ENGINE = InnoDB;

DROP TABLE IF EXISTS `Order`;

CREATE TABLE IF NOT EXISTS `Order`(
    `idOrder` INT NOT NULL,
    `RequestedTime` DATETIME NOT NULL,
    `ResponsibleStaffMember` VARCHAR(100),
    `CustomerDetails` VARCHAR(300),
    PRIMARY KEY (`idOrder`))
ENGINE = InnoDB;

DROP TABLE IF EXISTS `OrderLineItem`;

CREATE TABLE IF NOT EXISTS `OrderLineItem`(
    `idSpatula` INT NOT NULL,
    `idOrder` INT NOT NULL,
    `Quantity` INT NOT NULL,
    FOREIGN KEY (`idSpatula`)
      REFERENCES `Spatula` (`idSpatula`)
      ON DELETE NO ACTION
      ON UPDATE NO ACTION,
    FOREIGN KEY (`idOrder`)
      REFERENCES `Order` (`idOrder`)
      ON DELETE NO ACTION
      ON UPDATE NO ACTION)
ENGINE = InnoDB;

Answer 1

第一个表名和最后一个表名使用时出现拼写错误。

下面的作品。

CREATE TABLE IF NOT EXISTS `Spatula`(
    `idSpatula` INT NOT NULL,
    `ProductName` VARCHAR(50) NULL,
    `Type` ENUM('Food', 'Drugs', 'Paints', 'Plaster') NOT NULL,
    `Size` VARCHAR(50),
    `Colour` VARCHAR(50),
    `Price` DECIMAL(10,2),
    `QuantityInStock` INT NOT NULL,
    PRIMARY KEY (`idSpatula`))
ENGINE = InnoDB;

DROP TABLE IF EXISTS `Order`;

CREATE TABLE IF NOT EXISTS `Order`(
    `idOrder` INT NOT NULL,
    `RequestedTime` DATETIME NOT NULL,
    `ResponsibleStaffMember` VARCHAR(100),
    `CustomerDetails` VARCHAR(300),
    PRIMARY KEY (`idOrder`))
ENGINE = InnoDB;

DROP TABLE IF EXISTS `OrderLineItem`;

CREATE TABLE IF NOT EXISTS `OrderLineItem`(
    `idSpatula` INT NOT NULL,
    `idOrder` INT NOT NULL,
    `Quantity` INT NOT NULL,
    FOREIGN KEY (`idSpatula`)
      REFERENCES `Spatula` (`idSpatula`)
      ON DELETE NO ACTION
      ON UPDATE NO ACTION,
    FOREIGN KEY (`idOrder`)
      REFERENCES `Order` (`idOrder`)
      ON DELETE NO ACTION
      ON UPDATE NO ACTION
)ENGINE = InnoDB;