var mysql = require('mysql');
var mclient = mysql.createConnection({
    host: settings.MYSQL.HOST,
    user: settings.MYSQL.USER,
    password: settings.MYSQL.PASSWORD,
    database: settings.MYSQL.DB,
});

var mysql = require("mysql");
var pool = mysql.createPool(/* credentials go here */);

exports.getConnection = function(callback) {
  pool.getConnection(function(err, conn) {
    if(err) {
      return callback(err);
    }
    callback(err, conn);
  });
};

var mysqlLib = require("mysqlLib");

mysqlLib.getConnection(function(err, mclient) {
  //do queries that you need
});

var mysqlLib = require("mysqlLib");

mysqlLib.getConnection(function(err, mclient) {
  //do queries that you need
  var sql = '//Your SQL here';
  var inserts = [your inserts here];
  sql = mysql.format(sql, inserts);
  mclient.query(sql, function (err, rows) {

  if (err) {
                //handle error here
            }

  })
});