nodejs连mysql

const mysql = require('mysql');

const connection = mysql.createConnection({
  host: 'localhost',
  user: 'your_username',
  password: 'your_password',
  database: 'your_database'
});

connection.connect((err) => {
  if (err) {
    console.error('Error connecting to MySQL:', err);
    return;
  }
  console.log('Connected to MySQL!');
});

const connection = mysql.createConnection({
  host: 'localhost',
  user: 'your_username',
  password: 'your_password',
  database: 'your_database',
  connectTimeout: 10000 // 10秒
});

const mysql = require('mysql');

const connection = mysql.createConnection({
  host: 'localhost',
  user: 'your_username',
  password: 'your_password',
  database: 'your_database'
});

connection.connect((err) => {
  if (err) {
    console.error('Error connecting to MySQL:', err);
    return;
  }
  console.log('Connected to MySQL!');

  const sql = 'SELECT * FROM your_table';
  connection.query(sql, (err, results) => {
    if (err) {
      console.error('Error executing query:', err);
      return;
    }
    console.log('Query results:', results);
  });

  connection.end();
});