sample.js

var express = require('express');
var app = express();

app.use(express.bodyParser());

app.post('/path', function(req, res, next) {
  var query = req.body;
  SqlTable.query(query, function(err, results) {
    if (err) {
      return next(err);
    }
    res.json(results);
  });
});

app.listen(3000);