prepare.js

'use strict';

// get the client
const mysql = require('mysql2');

// create the connection to database
const connection = mysql.createConnection({
  host: 'localhost',
  user: 'root',
  database: 'test'
});

// execute will internally call prepare and query
connection.execute(
  'SELECT * FROM `table` WHERE `name` = ? AND `age` > ?',
  ['Rick C-137', 53],
  (err, results, fields) => {
    console.log(results); // results contains rows returned by server
    console.log(fields); // fields contains extra meta data about results, if available

    // If you execute same statement again, it will be picked form a LRU cache
    // which will save query preparation time and give better performance
  }
);