排长性感的小屁屁

https://www.bilibili.com/video/BV1MJ411Q7Do?p=5

1.新建test.js，分别执行MongoDB的查找和更新操作 var MongoClient = require('mongodb').MongoClient; var url = "mongodb://ip:27017/"; MongoClient.connect(url, { useNewUrlParser: true }, function(err, db) { if (err...