How to connect to MySQL using Node.js

If you want to use MySQL with your Node.js app here's how to do it:

Install the MySQL

First of all go to https://npmjs.org/package/mysql to check the latest version. At the day of this post:

npm install mysql@2.0.0-alpha7

Connect to the MySQL

Now add the following lines somewhere at the top of your application:

var mysql = require('mysql'); var connection = mysql.createConnection({ host : 'localhost', // port : '3308', database : 'my_dataase', user : 'my_user', password : 'my_password', });

Run a query

Use the following function to run a query. Notice the callback function you can use to retrieve rows, fields and errors.

I've used a for to go through all the returned results.

connection.query('SELECT * from my_table', function(err, rows, fields) { if (err){ console.log(err); } else{ console.log('************** Results **************'); for (var i = 0; i < rows.length; i++){ console.log(rows[i].MyField); } } });

About Ricard Torres

Senior Front-end Software Engineer from Barcelona, Haidong Gumdo Instructor (korean martial art of the sword), street photographer, travel lover, TV addict, Boston Red Sox fan, and privacy advocate.

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