如何利用MySQL和JavaScript开发一个简单的任务管理器

const mysql = require('mysql');
const connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  password: 'password',
  database: 'task_manager'
});

connection.connect((err) => {
  if (err) throw err;
  console.log('Connected to MySQL database');
});

function addTask(taskName, deadline, priority) {
  const task = { name: taskName, deadline: deadline, priority: priority };
  connection.query('INSERT INTO tasks SET ?', task, (err, res) => {
    if (err) throw err;
    console.log('Task added successfully');
  });
}

function editTask(taskId, updatedTask) {
  connection.query('UPDATE tasks SET ? WHERE id = ?', [updatedTask, taskId], (err, res) => {
    if (err) throw err;
    console.log('Task updated successfully');
  });
}

function deleteTask(taskId) {
  connection.query('DELETE FROM tasks WHERE id = ?', taskId, (err, res) => {
    if (err) throw err;
    console.log('Task deleted successfully');
  });
}

function displayTasks() {
  connection.query('SELECT * FROM tasks', (err, rows) => {
    if (err) throw err;
    console.log('Tasks:', rows);
  });
}

function searchTasks(keyword) {
  connection.query('SELECT * FROM tasks WHERE name LIKE ?', "%" + keyword + "%", (err, rows) => {
    if (err) throw err;
    console.log('Search results:', rows);
  });
}