我有一个名为nesql的文件夹，位于一个名为sqlnames1的文件夹中。在nesql文件夹中，我有以下文件。
sqlcreatedb.js文件

var mysql = require('mysql');

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

con.connect(function(err) {
  if (err) throw err;
  console.log("Connected!");
  /*Create a database named "mydb":*/
  con.query("CREATE DATABASE names", function (err, result) {
    if (err) throw err;
    console.log("Database created");
  });
});

sqlcreatetable.js文件

var mysql = require('mysql');

var con = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: "password",
  database: "names"
});

con.connect(function(err) {
  if (err) throw err;
  console.log("Connected!");
  /*Create a table named "customers":*/
  var sql = "CREATE TABLE people (id INT AUTO_INCREMENT PRIMARY KEY, firstName VARCHAR(255), lastName VARCHAR(255))";
  con.query(sql, function (err, result) {
    if (err) throw err;
    console.log("Table created");
  });
});

sqlinsertvalues.js文件

var mysql = require('mysql');

var con = mysql.createConnection({
  host: "localhost",
  user: "root",
  password: "password",
  database: "names"
});

con.connect(function(err) {
  if (err) throw err;
  console.log("Connected!");
  var sql = "INSERT INTO people (firstName, lastName) VALUES ?";
  var peoplenames = [
    ['Vedant', 'Apte'],
    ['Vedant', 'Savalajkar'],
    ['Vinay', 'Apte'],
    ['Varda', 'Apte'],
    ['Mihir', 'Wadekar'],
    ['Mihir', 'Kulkarni'],
    ['Eesha', 'Hazarika'],
    ['Eesha', 'Gupte'],
    ['Raunak', 'Sahu'],
    ['Hritvik', 'Agarwal'],
    ['Mahima', 'Kale'],
    ['Shivani', 'Sheth'],
    ['Arya', 'Chheda'],
    ['Diya', 'Shenoy']
  ];
  con.query(sql, [peoplenames], function (err, result) {
    if (err) throw err;
    console.log("Number of records inserted: " + result.affectedRows);
  });
});

所有这些文件都可以工作，因为我能够完成所有任务并成功接收所有相应的console.log语句。但是，我不确定如何将这些文件连接到位于sqlnames1文件夹中的app.js文件。有人知道怎么做吗？
这是我的app.js文件。

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;