我一直在慢慢学习node.js，这样我就可以更好地集成我们当前的许多ops（mysql）和xero会计。
我在mysql中有几个表，每个表对应[“invoices”，“accounts”，“items”，“organizations”，“receipts”，“taxrate”，“users”，“trackingcategories”]，每个表都有一个json列，其名称与其所在的表相同。这不是一个json问题。
从“+wewant1[i]”发送类似“select”+wewant1[i]+“的查询基本上是简单的“select invoices from invoices”，并且易于迭代。
我可以得到要列出的mysql结果，但是需要将每个单独的“列表”作为一个结果数组。
我最终希望能够将“从发票中选择发票”的结果作为节点（发票[0]、发票[1]等）中的“发票”数组引用。
我已经试着避免“回叫地狱”，但仍然无法让它工作。。。欢迎任何提示！
以下是当前代码：

var mysql = require('mysql');

var con = mysql.createConnection({
  host: "10.0.1.103",
  user: "badayaba",
  password: "yadabuba",
  database: "xeroetc"
});

(async function() {

  let wewant1 = ["invoices", "accounts", "items", "organisations", "receipts", "taxRates", "users", "trackingCategories"];

  function getmydata(sql, result, callback) {
    var query = con.query(sql);
    query.on('result', function(row) {
      callback(null, row);
    });
  };

  for (let i = 0; i < wewant1.length; i++) {
    var sql = "select " + wewant1[i] + " from " + wewant1[i];
    getmydata(sql, wewant1[i], function querydata(err, result) {
      console.log(err || result);
      return result;
    });
  };
  con.end();
})();

20180910 22:00 gmt-6谢谢steven！我想我明白了：

const XeroClient = require('xero-node').AccountingAPIClient;
const XeroErrors = require('xero-node').XeroError;
var mysql = require('mysql');

const config = {
    appType: "private",
    consumerKey: "_____",
    consumerSecret: "_____",
    privateKeyPath: "../../../ssl/_____.pem"
  };

var con = mysql.createConnection({
    host: "_____",
    user: "_____",
    password: "_____",
    database: "xeroetc"
});

(async function(){

let wewant1 = ["invoices","accounts","items","organisations","receipts","taxRates","users","trackingCategories"];

let xero = new XeroClient(config);

function getmydata(it, callback) {
       var sql = "select "+it+" from "+it;
       con.query(sql, function (err, result, fields) {
        if (err) throw err;
        callback(null,result);
    });
  };

  const promises = wewant1.map(it => {
     return new Promise((resolve, reject) => {
       getmydata(it, function querydata(err, result) {
         if (err) {
           reject(err);
         } else {
           resolve(result);
         }
       });
     })
  });

  Promise.all(promises)
  .then(results => {
    //results is a array of the resolved promises
    invoices=results[0];
    accounts=results[1];
    items=results[2];
    organisations=results[3];
    receipts=results[4];
    taxRates=results[5];
    users=results[6];
    trackingCategories=results[7];
    console.log(invoices);
    })
  .catch(err => {})
    .then(() => {
        con.end();
    })
})();