Кирилл Николаевич

const pool = mysql.createPool({
    host     : 'localhost',
    user     : 'root',
    password : '',
    database : 'chat'
});

pool.getConnection(function(err, connection) {
	if(err) {
		console.log(err);
	}
	let sql = "SELECT * FROM `table`";
	connection.query(sql, [], function(err, results) {
		connection.release(); // always put connection back in pool after last query
		console.log(results);
		if(err) {
			console.log(err);
		}
	});
});