nodejs+mysql入门实例（删）

//连接数据库
var mysql = require('mysql');
var connection = mysql.createConnection({
    host: 'bdm253137448.my3w.com', //数据库地址
    user: 'bdm253137448',   //数据库用户名
    password: 'muchengfeng123', //数据库管理密码
    database:'bdm253137448_db', //数据库名称
    insecureAuth: true
});

connection.connect(function(err) {
  if (err) {
    console.error('error connecting: ' + err.stack);
    return;
  }

  console.log('connected as id ' + connection.threadId);
});

var  userDelSql = 'DELETE FROM userinfo WHERE id = 3';
//删除
connection.query(userDelSql,function (err, result) {
        if(err){
          console.log('[DELETE ERROR] - ',err.message);
          return;
        }       

       console.log('-------------DELETE--------------');
       console.log('DELETE affectedRows',result.affectedRows);
       console.log('&&&&&&&&&&&&&&&&&');
});
//关闭连接
connection.end();