基于mysql的扩展，在它的基础上完成Prepared statements
npm install mysql-extensionvar mysql = require('mysql-extension');
var db = mysql.createConnection({
host : 'example.org',
user : 'bob',
password : 'secret'
});
db.query('SELECT name FROM T1 WHERE id = "042129"', function (err, info) {
});
var sql = 'SELECT name FROM T1 WHERE id = :id';
var params = { id: '042129' };
db.query({sql: sql, params: params}, function (err, info) {
});