CREATE TABLE customer ( customer_id INT PRIMARY KEY IDENTITY(1,1), name VARCHAR(20), id_card VARCHAR(18), username VARCHAR(20), password VARCHAR(20), phone VARCHAR(11) UNIQUE );给出上表的数据字典

数据字典如下：

表名：customer

| 字段名 | 数据类型 | 主键 | 描述 |
| ----------- | ------ | -- | ---------------------- |
| customer_id | INT | √ | 客户ID，自增长整数 |
| name | VARCHAR | | 客户姓名 |
| id_card | VARCHAR | | 客户身份证号码 |
| username | VARCHAR | | 客户登录用户名 |
| password | VARCHAR | | 客户登录密码 |
| phone | VARCHAR | √ | 客户手机号码，唯一约束条件 |

相关问题

-- 创建顾客表： CREATE TABLE Customer ( Customer_id VARCHAR(50) PRIMARY KEY, Customer_name VARCHAR(50), Customer_gender VARCHAR(10), Customer_phone VARCHAR(20), Customer_address VARCHAR(100) ); -- 创建商品表： CREATE TABLE Product ( Product_id INT PRIMARY KEY, Product_name VARCHAR(50), Product_type VARCHAR(20), Product_price DECIMAL(10, 2), stock_num INT ); -- 创建员工表： CREATE TABLE Employee ( Employee_id INT PRIMARY KEY, Employee_name VARCHAR(50), Employee_gender VARCHAR(10), Employee_phone VARCHAR(20), Employee_position VARCHAR(50) ); -- 创建供货商表： CREATE TABLE Supplier ( Supplier_id VARCHAR(50) PRIMARY KEY, Product_list VARCHAR(50), Supplier_name VARCHAR(50), Supplier_contact VARCHAR(50), Supplier_phone VARCHAR(20), Supplier_address VARCHAR(100) ); -- 创建销售表： CREATE TABLE Sale ( Sale_id INT AUTO_INCREMENT PRIMARY KEY, Product_id INT, Order_id INT, Order_date DATE, Employee_id INT, Customer_id VARCHAR(50), Sale_num INT, Sale_amount DECIMAL(10, 2), FOREIGN KEY (Product_id) REFERENCES Product (Product_id), FOREIGN KEY (Employee_id) REFERENCES Employee (Employee_id), FOREIGN KEY (Customer_id) REFERENCES Customer (Customer_id) ); -- 创建库存表： CREATE TABLE Stock ( Product_id VARCHAR(50) PRIMARY KEY, Stock_num INT, Supplier_id VARCHAR(50), indata DATE ); -- 创建商品与供货商的关系表 CREATE TABLE Product_Supplier ( Supplier_id VARCHAR(50) NOT NULL, Product_id VARCHAR(50) NOT NULL, PRIMARY KEY (Product_id, Supplier_id) ); -- 创建订单表： CREATE TABLE Order_dd ( Order_id INT AUTO_INCREMENT PRIMARY KEY, Product_id INT, Product_num INT, Customer_id VARCHAR(50), Order_date DATE, Order_price DECIMAL(10, 2), Order_status ENUM('待发货', '已发货', '待确认','已完成') ); 以上代码如何创建触发器，使得product_supplier表中某个商品的供货商发生改变时库存表中的对应商品的供货商也同步更新

可以使用以下触发器实现该功能：

CREATE TRIGGER `update_supplier` AFTER UPDATE ON `Product_Supplier`
FOR EACH ROW
BEGIN
	UPDATE Stock SET Supplier_id = NEW.Supplier_id WHERE Product_id = NEW.Product_id;
END;

这个触发器会在Product_Supplier表中某个商品的供货商发生改变时触发，然后将库存表Stock中对应商品的供货商更新为新的供货商。

使用 CREATE TABLE 语句对关系架构进行编码。请注意，这组语句应指定完整性约束：键、关系等。Book 表： ISBN (主键) Title Edition Date of Publication Price Book Description Author 表： Author_id (主键) Author Name Publisher 表： Publisher id (主键) Publisher Name Address AK: Publisher Name + Address Customer 表： Customer_id (主键) Name Mailing Address Phone Number Email Address AK: Credit Card Number and Expiration Date Shipment 表： Tracking Number (主键) Date of Shipment Date of Expected Delivery Order 表： Order Number (主键) Mailing Address Method of Shipment Date and Time of Order Total Price of the Order Promotion 表： Promotion id number (主键) Percentage Discount Points Duration of Promotion (start date and end date) Line Item 表： Book ISBN (外键指向 Book 表) Order Number (外键指向 Order 表) Total price for each book that is ordered Quantity of each item ordered Category 表： Category ID (主键) Category Name

好的，以下是对关系架构进行编码的 CREATE TABLE 语句，包含了完整性约束：

CREATE TABLE Book (
    ISBN varchar(13) PRIMARY KEY,
    Title varchar(255) NOT NULL,
    Edition int NOT NULL,
    Date_of_Publication date NOT NULL,
    Price decimal(10, 2) NOT NULL,
    Book_Description varchar(1000) NOT NULL
);

CREATE TABLE Author (
    Author_id int PRIMARY KEY,
    Author_Name varchar(255) NOT NULL
);

CREATE TABLE Publisher (
    Publisher_id int PRIMARY KEY,
    Publisher_Name varchar(255) NOT NULL,
    Address varchar(500) NOT NULL,
    CONSTRAINT AK_Publisher UNIQUE (Publisher_Name, Address)
);

CREATE TABLE Customer (
    Customer_id int PRIMARY KEY,
    Name varchar(255) NOT NULL,
    Mailing_Address varchar(500) NOT NULL,
    Phone_Number varchar(20) NOT NULL,
    Email_Address varchar(255) NOT NULL,
    CONSTRAINT AK_CreditCard UNIQUE (Credit_Card_Number, Expiration_Date)
);

CREATE TABLE Shipment (
    Tracking_Number int PRIMARY KEY,
    Date_of_Shipment datetime NOT NULL,
    Date_of_Expected_Delivery datetime NOT NULL
);

CREATE TABLE Order (
    Order_Number int PRIMARY KEY,
    Mailing_Address varchar(500) NOT NULL,
    Method_of_Shipment varchar(255) NOT NULL,
    Date_and_Time_of_Order datetime NOT NULL,
    Total_Price_of_Order decimal(10, 2) NOT NULL,
    CONSTRAINT FK_Customer_Order FOREIGN KEY (Customer_id) REFERENCES Customer(Customer_id)
);

CREATE TABLE Promotion (
    Promotion_id int PRIMARY KEY,
    Percentage_Discount decimal(5, 2) NOT NULL,
    Points int NOT NULL,
    Start_Date date NOT NULL,
    End_Date date NOT NULL
);

CREATE TABLE Line_Item (
    Book_ISBN varchar(13) NOT NULL,
    Order_Number int NOT NULL,
    Total_Price decimal(10, 2) NOT NULL,
    Quantity int NOT NULL,
    CONSTRAINT PK_Line_Item PRIMARY KEY (Book_ISBN, Order_Number),
    CONSTRAINT FK_Book_Line_Item FOREIGN KEY (Book_ISBN) REFERENCES Book(ISBN),
    CONSTRAINT FK_Order_Line_Item FOREIGN KEY (Order_Number) REFERENCES Order(Order_Number)
);

CREATE TABLE Category (
    Category_ID int PRIMARY KEY,
    Category_Name varchar(255) NOT NULL
);