var mongoose=require('mongoose'),
Schema=mongoose.Schema;
 mongoose.connect('mongodb://localhost:27017/myapp',(err)=>{
  if(err)throw err;
  console.log('连接成功!'); 
  });
//users就是表名
var MyModel = mongoose.model('users', new Schema({ name: String }));
//插入一条记录
/*MyModel.create({name:'monica'},(err,result)=>{
if(err)throw err;
console.log('saved  One!'+result)
})*/
/*var users=[{name:'欣然'},{name:'纵横'},{name:'思虑'},{name:'南泱'}];
//插入多条记录
MyModel.insertMany(users,(err,result)=>{
if(err)throw err;
console.log('saved  Many!'+result)
})*/
//查询
/*MyModel.findOne({name:'monica'},(err,result)=>{
if(err)throw err;
console.log('find by name',result);
});
*/
//删除
/*MyModel.deleteOne({ name: 'monica' }, (err,result)=>{
if(err)throw err;
console.log('deletedOne'+result);
});*/
//更新
MyModel.updateOne({ name: '南泱' }, { name: '苏与' }, (err)=> {
  if(err)throw err;
console.log('updateOne!');
});

emm,查看表数据可下载mongodb可视化工具studio 3t查看,mlab在线查看也可以！