CREATE DATABASE mydatabase; USE mydatabase; CREATE TABLE customers ( customerID varchar(8) primary key, name varchar(40) default NULL, phone varchar(16) default NULL ); INSERT INTO customers VALUES ('ADDIFK01','Frank Addinsell', '(718) 555-3911'); INSERT INTO customers VALUES ('ALBIBB01','Bob Albinoni', '(213) 555-7566');package homework7_二_1_20221548; import java.sql.*; import javax.swing.JOptionPane; public class DemoInsert { public static void main(String args[]){ String url="jdbc:mysql://127.0.0.1:3306/mydatabase"; String user="root",pwd=""; Connection con; Statement sql; ResultSet rs; try {Class.forName("com.mysql.jdbc.Driver"); }catch (ClassNotFoundException e){ System.out.println("test"+e); } try { con = DriverManager.getConnection(url, user, pwd); sql = con.createStatement(); String mysql = "INSERT INTO customers VALUES('ALBRDE01','DAVE Albrechtsberger','(508) 555-1216"; int k = sql.executeUpdate(mysql); if (k == 1) JOptionPane.showMessageDialog(null, "插入记录成功", "成功", JOptionPane.PLAIN_MESSAGE); con.close(); }catch (SQLException ee){ JOptionPane.showMessageDialog(null, "插入记录失败", "失败", JOptionPane.ERROR_MESSAGE); } } }为什么显示插入数据失败？

在这个例子中，插入数据失败是因为 SQL 语句中缺少一个右括号。正确的 SQL 语句应该是：

String mysql = "INSERT INTO customers VALUES('ALBRDE01','DAVE Albrechtsberger','(508) 555-1216')";

你需要在插入数据时，确保 SQL 语句的正确性，否则插入数据会失败。

相关问题

1、在MySQL中运行以下脚本 CREATE DATABASE mydatabase; USE mydatabase; CREATE TABLE customers ( customerID varchar(8) primary key, name varchar(40) default NULL, phone varchar(16) default NULL ); INSERT INTO customers VALUES ('ADDIFK01','Frank Addinsell', '(718) 555-3911'); INSERT INTO customers VALUES ('ALBIBB01','Bob Albinoni', '(213) 555-7566'); 使用 JDBC编写程序读出数据库表中数据并在Console下输出内容

好的，以下是一个简单的 Java 程序，可以连接 MySQL 数据库并读取 customers 表的数据并在控制台输出：

import java.sql.*;

public class ReadMySQL {
    public static void main(String[] args) {
        try {
            // 1. 加载 MySQL JDBC 驱动程序
            Class.forName("com.mysql.jdbc.Driver");
            
            // 2. 连接到 MySQL 数据库
            Connection conn = DriverManager.getConnection(
                "jdbc:mysql://localhost/mydatabase", "root", "password");
            
            // 3. 构造 SQL 查询语句
            String sql = "SELECT * FROM customers";
            
            // 4. 执行 SQL 查询语句
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery(sql);
            
            // 5. 遍历查询结果并输出到控制台
            while (rs.next()) {
                String id = rs.getString("customerID");
                String name = rs.getString("name");
                String phone = rs.getString("phone");
                System.out.println(id + ", " + name + ", " + phone);
            }
            
            // 6. 关闭连接和其他资源
            rs.close();
            stmt.close();
            conn.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

需要注意的是，上述代码中的 `localhost`、`root` 和 `password` 分别表示 MySQL 数据库的主机名、用户名和密码，需要替换为实际的值。另外，如果 MySQL 数据库不是默认的 3306 端口，还需要在连接字符串中指定端口号。

根据这些信息提供创建数据库和创建数据表的Oracle代码：CUSTOMER: stores customer information such as name, address, phone number, email, and loyalty program status. This table has the primary key of CustomerID. • ORDER: stores information about each order such as the order date, order status, and total cost. This table has a primary key of OrderID and a foreign key to the Customer table. • ORDER_DETAILS: stores details about each item in an order such as the product name, price, quantity, and subtotal. This table has a primary key of OrderDetailID and foreign keys to the Order and PRODUCT tables. • PRODUCT: stores information about each product such as the product name, description, price, and category. This table has the primary key of ProductID. • STORE: stores information about each store such as the store name, location, and hours of operation. This table has the primary key of StoreID. • INVENTORY: stores information about the inventory for each product in each store such as the quantity on hand and the reorder point. This table has a composite primary key of ProductID and StoreID. Group Assignment • TRANSACTION: stores information about each transaction such as the transaction date, transaction type, and total amount. This table has a primary key of TransactionID and a foreign key to the Customer table. • TRANSACTION_DETAILS: stores details about each item in a transaction such as the product name, price, quantity, and subtotal. This table has the primary key of TransactionDetailID and foreign keys to the TRANSACTION and PRODUCT tables. • EMPLOYEE: stores employee information such as name, address, phone number, email, and position. This table has the primary key of EmployeeID. • SALARY: stores information about the salary for each employee such as the salary amount, start date, and end date. This table has a composite primary key of EmployeeID and StartDate. • SHIFT: stores information about the shift for each employee such as the start time, end time, and store location. This table has a primary key of ShiftID and foreign keys to the Employee and STORE tables.

以下是创建数据库和创建数据表的Oracle代码：

创建数据库：

CREATE DATABASE myDatabase;

创建数据表：

CREATE TABLE CUSTOMER (
    CustomerID INT PRIMARY KEY,
    Name VARCHAR(50),
    Address VARCHAR(100),
    Phone VARCHAR(20),
    Email VARCHAR(50),
    LoyaltyProgramStatus VARCHAR(20)
);

CREATE TABLE ORDER (
    OrderID INT PRIMARY KEY,
    OrderDate DATE,
    OrderStatus VARCHAR(20),
    TotalCost DECIMAL(10, 2),
    CustomerID INT FOREIGN KEY REFERENCES CUSTOMER(CustomerID)
);

CREATE TABLE ORDER_DETAILS (
    OrderDetailID INT PRIMARY KEY,
    ProductName VARCHAR(50),
    Price DECIMAL(10, 2),
    Quantity INT,
    Subtotal DECIMAL(10, 2),
    OrderID INT FOREIGN KEY REFERENCES ORDER(OrderID),
    ProductID INT FOREIGN KEY REFERENCES PRODUCT(ProductID)
);

CREATE TABLE PRODUCT (
    ProductID INT PRIMARY KEY,
    ProductName VARCHAR(50),
    Description VARCHAR(100),
    Price DECIMAL(10, 2),
    Category VARCHAR(50)
);

CREATE TABLE STORE (
    StoreID INT PRIMARY KEY,
    StoreName VARCHAR(50),
    Location VARCHAR(100),
    HoursOfOperation VARCHAR(50)
);

CREATE TABLE INVENTORY (
    ProductID INT,
    StoreID INT,
    QuantityOnHand INT,
    ReorderPoint INT,
    PRIMARY KEY (ProductID, StoreID),
    FOREIGN KEY (ProductID) REFERENCES PRODUCT(ProductID),
    FOREIGN KEY (StoreID) REFERENCES STORE(StoreID)
);

CREATE TABLE TRANSACTION (
    TransactionID INT PRIMARY KEY,
    TransactionDate DATE,
    TransactionType VARCHAR(20),
    TotalAmount DECIMAL(10, 2),
    CustomerID INT FOREIGN KEY REFERENCES CUSTOMER(CustomerID)
);

CREATE TABLE TRANSACTION_DETAILS (
    TransactionDetailID INT PRIMARY KEY,
    ProductName VARCHAR(50),
    Price DECIMAL(10, 2),
    Quantity INT,
    Subtotal DECIMAL(10, 2),
    TransactionID INT FOREIGN KEY REFERENCES TRANSACTION(TransactionID),
    ProductID INT FOREIGN KEY REFERENCES PRODUCT(ProductID)
);

CREATE TABLE EMPLOYEE (
    EmployeeID INT PRIMARY KEY,
    Name VARCHAR(50),
    Address VARCHAR(100),
    Phone VARCHAR(20),
    Email VARCHAR(50),
    Position VARCHAR(50)
);

CREATE TABLE SALARY (
    EmployeeID INT,
    StartDate DATE,
    EndDate DATE,
    SalaryAmount DECIMAL(10, 2),
    PRIMARY KEY (EmployeeID, StartDate),
    FOREIGN KEY (EmployeeID) REFERENCES EMPLOYEE(EmployeeID)
);

CREATE TABLE SHIFT (
    ShiftID INT PRIMARY KEY,
    StartTime TIME,
    EndTime TIME,
    StoreID INT FOREIGN KEY REFERENCES STORE(StoreID),
    EmployeeID INT FOREIGN KEY REFERENCES EMPLOYEE(EmployeeID)
);