postgres3.js

// Adapted from the documentation of https://github.com/brianc/node-postgres,
// which is licensed under the MIT license; see file node-postgres-LICENSE.
var pg = require('pg');
 
// instantiate a new client 
// the client will read connection information from 
// the same environment variables used by postgres cli tools 
var client = new pg.Client();
 
// connect to our database 
client.connect(function (err) {
  if (err) throw err;
 
  // execute a query on our database 
  client.query('SELECT $1::text as name', ['brianc'], function (err, result) {
    if (err) throw err;
 
    // just print the result to the console 
    console.log(result.rows[0]); // outputs: { name: 'brianc' } 
 
    // disconnect the client 
    client.end(function (err) {
      if (err) throw err;
    });
  });
});