Node.js MySQL Create Database

In Node.js, you can create a new MySQL database using the mysql module. In this tutorial, we'll discuss how to create a MySQL database using Node.js.

Syntax

The syntax for creating a database in MySQL using Node.js is as follows:

var mysql = require('mysql');

var connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  password: 'password'
});

connection.connect(function(err) {
  if (err) throw err;
  console.log('Connected!');

  connection.query('CREATE DATABASE mydb', function (err, result) {
    if (err) throw err;
    console.log('Database created');
  });
});

This code block creates a new connection to a MySQL server using the mysql module. We then create a new database by executing a CREATE DATABASE query.

Example

Let's say we want to create a new database called "mydb". Here's how we can do it using Node.js and the mysql module:

var mysql = require('mysql');

var connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  password: 'password'
});

connection.connect(function(err) {
  if (err) throw err;
  console.log('Connected!');

  connection.query('CREATE DATABASE mydb', function (err, result) {
    if (err) throw err;
    console.log('Database created');
  });
});

Output

When we run the example code above, the output will be:

Connected!
Database created

This is because the code successfully connected to the MySQL server, executed a CREATE DATABASE query, and logged "Database created" to the console.

Explanation

In the example above, we first require the mysql module and create a new connection to a MySQL server using the credentials of the MySQL server we want to connect to. We then use the connection.query() method to execute a CREATE DATABASE statement to create a new database called "mydb".

The connection.query() method takes two arguments: the SQL statement to execute and a callback function that is called when the query is complete. If there is an error, the callback function will receive the error object. Otherwise, the callback function will receive the result of the query, which in this case is the message "Database created".

Use

You can use the mysql module to create new MySQL databases from your Node.js application. This can be useful if you need to create new databases programmatically or set up new environments.

Important Points

• Make sure you have the mysql module installed in your Node.js project before using it.
• Always make sure to handle errors in your code, especially when connecting to databases or executing queries.
• Be careful when granting database creation permissions to users or applications.

Summary

In this tutorial, we discussed how to create a MySQL database in Node.js using the mysql module. We covered the syntax, example, output, explanation, use, and important points of creating a new MySQL database using Node.js. With this knowledge, you can now create new MySQL databases from your Node.js application and execute CREATE DATABASE queries programmatically.