How to resolve errors when connecting Node.js to MySQL?

2 years ago
Benjamin Taylor
2 minutes

To address the errors encountered while connecting Node.js to MySQL, you can try the following steps:

  1. Make sure that MySQL database and Node.js have been installed correctly and that the MySQL service has been successfully started.
  2. Make sure the appropriate MySQL driver, such as mysql or mysql2, is installed in your Node.js project. You can install it using the npm command.
npm install mysql

It is unnecessary

npm install mysql2
  1. Ensure that the connection parameters, such as host, port, user, password, and database name, are correctly set in the code. For example:
const mysql = require('mysql');
const connection = mysql.createConnection({
  host: 'localhost',
  port: '3306',
  user: 'root',
  password: 'password',
  database: 'database_name'
});

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

Please modify the above connection parameters according to your own circumstances.

  1. If a specific error message appears during the connection process, further investigation can be conducted based on the error message. For instance, if you encounter the “ER_ACCESS_DENIED_ERROR”, it may be due to incorrect username or password provided.
  2. If the above steps fail to resolve the issue, you can try viewing the MySQL log file or using a debugging tool (such as node-inspector) to get more information in order to further troubleshoot the problem.

If the issue persists, we suggest providing more error information and detailed context in order to better help resolve the problem.

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