1. mongodb
安装目录：dmongodb
2. mongod.exe --dbpath d:mongodbdatadb
3. mongo.exe --port 27017
4. show dbs
5. use comment1
5. use comment2 创建
6. show collections
7. db.users.insert({})
8. db.users.find()
9. db.users.find().sort({age:1}) 1正序 -1倒序
10. compass图形化工具
11. node i mongoose -g