Node.js - how to connect with MySQL

In this article, we would like to show you how to use MySQL in Node.js.

Step 1 - Install the mysql module in your Node project. 

npm install mysql

Step 2 - Import the mysql module by using require and create a connection with MySQL database. 

const mysql = require('mysql');

const connection = mysql.createConnection({
    host: 'localhost',  // '127.0.0.1'
    user: 'root',
    password: 'password',
    database: 'database_name'
});

connection.connect(error => {
    if (error) throw error;
});

That's it, you've been connected and from now on you can query your database.

Practical example with SELECT query: 

const mysql = require("mysql");

const connection = mysql.createconnection({       // gets connection with database
    host: "localhost",  // '127.0.0.1'
    user: "root",
    password: "password",
    database: "database_name",
});

connection.connect((error) => {
    if (error) throw error;
    const query = 'SELECT * FROM ??';
    const tableName = ['users'];

    connection.query(query, (error, result) => {  // sends queries and receives results
        connection.end();                         // closes connection
        if (error) throw error;
        console.log(result);
  });
});

References: 

1. MySQL package - npm