sql-server-samples/samples/tutorials/node.js/windows/sample_nodejs_win.js

var Connection = require('tedious').Connection;
var config = {
    userName: 'yourusername',
    password: 'yourpassword',
    server: 'yourserver',

    options: {encrypt: true, database: 'yourdatabase'}
};
var connection = new Connection(config);
connection.on('connect', function(err) {
    // If no error, then good to proceed.
    console.log("Connected");
    executeStatement();

});

var Request = require('tedious').Request;
var TYPES = require('tedious').TYPES;

function executeStatement() {
    request = new Request("SELECT TOP 10 Title, FirstName, LastName from SalesLT.Customer;", function(err) {
    if (err) {
        console.log(err);} 
    });
    var result = "";
    request.on('row', function(columns) {
        columns.forEach(function(column) {
          if (column.value === null) {
            console.log('NULL');
          } else {
            result+= column.value + " ";
          }
        });
        console.log(result);
        result ="";
    });

    request.on('done', function(rowCount, more) {
    console.log(rowCount + ' rows returned');
    });
    connection.execSql(request);
}