let mysql = require('mysql');

let con = mysql.createConnection({
  host: "localhost",
  user: "myusername",
  password: "mypassword",
  database: "mydb"
});

con.connect(function(err) {
  if (err) throw err;
  /*Delete the "customers" table, but only if it already exist (to avoid errors):*/
  let sql = "DROP TABLE IF EXISTS customers";
  con.query(sql, function (err, result) {
    if (err) throw err;
    console.log(result);
  });
});