var mysql      = require('mysql');
var connection = mysql.createConnection({
  host     : '127.0.0.1',
  user     : 'root',
  port     : '13307',
  password : '123456',
  database : 'mailbox'
});

//创建一个connection
connection.connect(function(err){
    if(err){
          console.log('[query] - :'+err);
        return;
    }
      console.log('[connection connect]  succeed!');
});

//执行SQL语句
connection.query('SELECT * FROM mail', function(err, rows, fields) {
     if (err) {
             console.log('[query] - :'+err);
        return;
     }
     console.log('共有' + rows.length + '条记录。');
     for (var i = rows.length - 1; i >= 0; i--) {
      m=rows.length-i;
     console.log('第' + m + '条记录为: ', rows[m-1]);
     }
});

//关闭connection
connection.end(function(err){
    if(err){
        return;
    }
      console.log('[connection end] succeed!');
});