数据库——建立ER模型及关系模型转换

Hellespontus2024-01-01 9:11

​

【实验内容及要求】

  1. 使用画图工具或MySQL Workbench等建模工具设计出相应的ER图，将局部ER图合并为一个整体ER模型，在ER模型中填加多样性约束，建立显示主键的ER模型，标识实体的属性，确认主键、外键。
  2. 将上述ER图转化为关系模式，要求标出每个关系的主码和外码
  3. 依据创建的模型，生成SQL语句，在MySQL里创建数据库和表

【实验平台】

Windows MySQL + MySQL Workbench

MySQL Workbench: MySQL

Workbench是为MySQL设计的ER/数据库建模工具。是著名的数据库设计工具DBDesigner4的继任者。具有设计和创建新的数据库图示，建立数据库文档，以及进行复杂的MySQL

迁移的作用

【实验步骤】

  1. 新建模型

  2. 为表添加字段和完整性约束

  3. 导出SQL语句

  4. 执行SQL语句，产生数据库和表

【实验结果】

  1. ER模型
  2. SQL文件
SQL 复制代码 
-- MySQL Script generated by MySQL Workbench
-- Mon May 23 15:15:50 2022
-- Model: New Model    Version: 1.0
-- MySQL Workbench Forward Engineering

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';

-- -----------------------------------------------------
-- Schema mydb
-- -----------------------------------------------------
DROP SCHEMA IF EXISTS `mydb` ;

-- -----------------------------------------------------
-- Schema mydb
-- -----------------------------------------------------
CREATE SCHEMA IF NOT EXISTS `mydb` DEFAULT CHARACTER SET utf8 ;
USE `mydb` ;

-- -----------------------------------------------------
-- Table `mydb`.`Customer`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`Customer` ;

CREATE TABLE IF NOT EXISTS `mydb`.`Customer` (
  `customerNo` INT NOT NULL,
`customerName` VARCHAR(45) NULL,
  `customerStreet` VARCHAR(45) NULL,
  `customerCity` VARCHAR(45) NULL,
  `customerState` VARCHAR(45) NULL,
  `customerZipCode` VARCHAR(45) NULL,
  `custTelNo` VARCHAR(45) NULL,
  `custFaxNo` VARCHAR(45) NULL,
  `DOB` VARCHAR(45) NULL,
  `maritalStatus` VARCHAR(45) NULL,
  `creditRating` VARCHAR(45) NULL,
  PRIMARY KEY (`customerNo`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`Employee`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`Employee` ;

CREATE TABLE IF NOT EXISTS `mydb`.`Employee` (
  `employeeNo` INT NOT NULL,
  `title` VARCHAR(45) NULL,
  `firstName` VARCHAR(45) NULL,
  `middleName` VARCHAR(45) NULL,
  `lastName` VARCHAR(45) NULL,
  `address` VARCHAR(45) NULL,
  `workTelExt` VARCHAR(45) NULL,
  `homeTelNo` VARCHAR(45) NULL,
  `empEmailAddress` VARCHAR(45) NULL,
  `socialSecurityNumber` VARCHAR(45) NULL,
  `DOB` VARCHAR(45) NULL,
  `position` VARCHAR(45) NULL,
  `sex` VARCHAR(45) NULL,
  `salary` VARCHAR(45) NULL,
  `dateStarted` VARCHAR(45) NULL,
  PRIMARY KEY (`employeeNo`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`PaymentMethod`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`PaymentMethod` ;

CREATE TABLE IF NOT EXISTS `mydb`.`PaymentMethod` (
  `pMethodNo` INT NOT NULL,
  `paymentMethod` VARCHAR(45) NULL,
  PRIMARY KEY (`pMethodNo`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`Order`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`Order` ;
CREATE TABLE IF NOT EXISTS `mydb`.`Order` (
  `orderNo` INT NOT NULL,
  `orderDate` VARCHAR(45) NULL,
  `billingStreet` VARCHAR(45) NULL,
  `billingCity` VARCHAR(45) NULL,
  `billingState` VARCHAR(45) NULL,
  `billingZipCode` VARCHAR(45) NULL,
  `promisedDate` VARCHAR(45) NULL,
  `status` VARCHAR(45) NULL,
  `customerNo` VARCHAR(45) NULL,
  `employeeNo` VARCHAR(45) NULL,
  `Invoice_InvoiceNo` INT NOT NULL,
  `Invoice_PaymentMethod_pMethodNo` INT NOT NULL,
  `Customer_customerNo` INT NOT NULL,
  `Employee_employeeNo` INT NOT NULL,
  PRIMARY KEY (`orderNo`, `Invoice_InvoiceNo`, `Invoice_PaymentMethod_pMethodNo`, `Customer_customerNo`),
  INDEX `fk_Order_Customer1_idx` (`Customer_customerNo` ASC) VISIBLE,
  INDEX `fk_Order_Employee1_idx` (`Employee_employeeNo` ASC) VISIBLE,
  CONSTRAINT `fk_Order_Invoice1`
    FOREIGN KEY ()
    REFERENCES `mydb`.`Invoice` ()
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_Order_Customer1`
    FOREIGN KEY (`Customer_customerNo`)
    REFERENCES `mydb`.`Customer` (`customerNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_Order_Employee1`
    FOREIGN KEY (`Employee_employeeNo`)
    REFERENCES `mydb`.`Employee` (`employeeNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`Invoice`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`Invoice` ;

CREATE TABLE IF NOT EXISTS `mydb`.`Invoice` (
  `InvoiceNo` INT NOT NULL,
  `dateRaised` VARCHAR(45) NULL,
  `datePaid` VARCHAR(45) NULL,
  `creditCardNo` VARCHAR(45) NULL,
  `hodlersName` VARCHAR(45) NULL,
  `expiryDate` VARCHAR(45) NULL,
  `orderNo` INT NULL,
  `pMethodNo` VARCHAR(45) NULL,
  `PaymentMethod_pMethodNo` INT NOT NULL,
  PRIMARY KEY (`InvoiceNo`, `PaymentMethod_pMethodNo`),
  INDEX `fk_Invoice_PaymentMethod_idx` (`PaymentMethod_pMethodNo` ASC) VISIBLE,
  CONSTRAINT `fk_Invoice_PaymentMethod`
    FOREIGN KEY (`PaymentMethod_pMethodNo`)
    REFERENCES `mydb`.`PaymentMethod` (`pMethodNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `orderNo`
    FOREIGN KEY ()
    REFERENCES `mydb`.`Order` ()
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`Product`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`Product` ;

CREATE TABLE IF NOT EXISTS `mydb`.`Product` (
  `productNo` INT NOT NULL,
  `productName` VARCHAR(45) NULL,
  `serialNo` VARCHAR(45) NULL,
  `unitPrice` VARCHAR(45) NULL,
  `quantityOnHand` VARCHAR(45) NULL,
  `reorderLevel` VARCHAR(45) NULL,
  `reorderQuantity` VARCHAR(45) NULL,
  `reorderLeadTime` VARCHAR(45) NULL,
  PRIMARY KEY (`productNo`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`OrderDetail`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`OrderDetail` ;

CREATE TABLE IF NOT EXISTS `mydb`.`OrderDetail` (
  `orderNo` INT NOT NULL,
  `productNo` VARCHAR(45) NULL,
  `quantityOrdered` VARCHAR(45) NULL,
  `Product_productNo` INT NOT NULL,
  `Order_orderNo` INT NOT NULL,
  `Order_Invoice_InvoiceNo` INT NOT NULL,
  `Order_Invoice_PaymentMethod_pMethodNo` INT NOT NULL,
  `Order_Customer_customerNo` INT NOT NULL,
  PRIMARY KEY (`orderNo`, `Product_productNo`, `Order_orderNo`, `Order_Invoice_InvoiceNo`, `Order_Invoice_PaymentMethod_pMethodNo`, `Order_Customer_customerNo`),
  INDEX `fk_OrderDetail_Product1_idx` (`Product_productNo` ASC) VISIBLE,
  INDEX `fk_OrderDetail_Order1_idx` (`Order_orderNo` ASC, `Order_Invoice_InvoiceNo` ASC, `Order_Invoice_PaymentMethod_pMethodNo` ASC, `Order_Customer_customerNo` ASC) VISIBLE,
  CONSTRAINT `fk_OrderDetail_Product1`
    FOREIGN KEY (`Product_productNo`)
    REFERENCES `mydb`.`Product` (`productNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_OrderDetail_Order1`
    FOREIGN KEY (`Order_orderNo` , `Order_Invoice_InvoiceNo` , `Order_Invoice_PaymentMethod_pMethodNo` , `Order_Customer_customerNo`)
    REFERENCES `mydb`.`Order` (`orderNo` , `Invoice_InvoiceNo` , `Invoice_PaymentMethod_pMethodNo` , `Customer_customerNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`ShipmentMethod`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`ShipmentMethod` ;

CREATE TABLE IF NOT EXISTS `mydb`.`ShipmentMethod` (
  `sMethodNo` INT NOT NULL,
  `shipmentMethod` VARCHAR(45) NULL,
  PRIMARY KEY (`sMethodNo`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`Shipment`
-- -----------------------------------------------------
DROP TABLE IF EXISTS `mydb`.`Shipment` ;

CREATE TABLE IF NOT EXISTS `mydb`.`Shipment` (
  `shipmentNo` INT NOT NULL,
  `quantity` VARCHAR(45) NULL,
  `shipmentDate` VARCHAR(45) NULL,
  `completeStatus` VARCHAR(45) NULL,
  `orderNo` INT NULL,
  `productNo` VARCHAR(45) NULL,
  `employeeNo` INT NULL,
  `sMethodNo` INT NULL,
  `OrderDetail_orderNo` INT NOT NULL,
  `OrderDetail_Product_productNo` INT NOT NULL,
  `OrderDetail_Order_orderNo` INT NOT NULL,
  `OrderDetail_Order_Invoice_InvoiceNo` INT NOT NULL,
  `OrderDetail_Order_Invoice_PaymentMethod_pMethodNo` INT NOT NULL,
  `OrderDetail_Order_Customer_customerNo` INT NOT NULL,
  `ShipmentMethod_sMethodNo` INT NOT NULL,
  `Employee_employeeNo` INT NOT NULL,
  PRIMARY KEY (`shipmentNo`, `OrderDetail_orderNo`, `OrderDetail_Product_productNo`, `OrderDetail_Order_orderNo`, `OrderDetail_Order_Invoice_InvoiceNo`, `OrderDetail_Order_Invoice_PaymentMethod_pMethodNo`, `OrderDetail_Order_Customer_customerNo`, `ShipmentMethod_sMethodNo`),
  INDEX `fk_Shipment_OrderDetail1_idx` (`OrderDetail_orderNo` ASC, `OrderDetail_Product_productNo` ASC, `OrderDetail_Order_orderNo` ASC, `OrderDetail_Order_Invoice_InvoiceNo` ASC, `OrderDetail_Order_Invoice_PaymentMethod_pMethodNo` ASC, `OrderDetail_Order_Customer_customerNo` ASC, `orderNo` ASC) VISIBLE,
  INDEX `fk_Shipment_ShipmentMethod1_idx` (`ShipmentMethod_sMethodNo` ASC, `sMethodNo` ASC, `OrderDetail_orderNo` ASC, `OrderDetail_Product_productNo` ASC, `OrderDetail_Order_orderNo` ASC, `OrderDetail_Order_Invoice_InvoiceNo` ASC, `OrderDetail_Order_Invoice_PaymentMethod_pMethodNo` ASC, `OrderDetail_Order_Customer_customerNo` ASC) VISIBLE,
  INDEX `fk_Shipment_Employee1_idx` (`Employee_employeeNo` ASC) VISIBLE,
  INDEX `orderNo_idx` (`orderNo` ASC) VISIBLE,
  CONSTRAINT `orderNo`
    FOREIGN KEY (`OrderDetail_orderNo` , `OrderDetail_Product_productNo` , `OrderDetail_Order_orderNo` , `OrderDetail_Order_Invoice_InvoiceNo` , `OrderDetail_Order_Invoice_PaymentMethod_pMethodNo` , `OrderDetail_Order_Customer_customerNo` , `orderNo`)
    REFERENCES `mydb`.`OrderDetail` (`orderNo` , `orderNo` , `orderNo` , `orderNo` , `orderNo` , `orderNo` , `orderNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `sMethodNo`
    FOREIGN KEY (`ShipmentMethod_sMethodNo` , `sMethodNo` , `OrderDetail_orderNo` , `OrderDetail_Product_productNo` , `OrderDetail_Order_orderNo` , `OrderDetail_Order_Invoice_InvoiceNo` , `OrderDetail_Order_Invoice_PaymentMethod_pMethodNo` , `OrderDetail_Order_Customer_customerNo`)
    REFERENCES `mydb`.`ShipmentMethod` (`sMethodNo` , `sMethodNo` , `sMethodNo` , `sMethodNo` , `sMethodNo` , `sMethodNo` , `sMethodNo` , `sMethodNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `employeeNo`
    FOREIGN KEY (`Employee_employeeNo`)
    REFERENCES `mydb`.`Employee` (`employeeNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `orderNo`
    FOREIGN KEY (`orderNo`)
    REFERENCES `mydb`.`OrderDetail` (`orderNo`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;
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