Mongo common command ten commands, including database switch, data insert, modify, delete, query operations. This article is a quick way to learn common commands.

Read the source code to explore the generation mechanism of the mongodb-objectid. The old ObjectId consists of four parts and the new ObjectId consists of only three parts

Mongodb install manual MAC install mongodb manually install mongodb to a certain degree on a large search, this I do not want to mention, according to the above step by step to the line. Brew install mongodb

Mongodb is a Nosql database distributed file storage database written in C++, high performance using BSON document storage

This paper introduces the MongoDB array aggregation operations in the array element expansion, array sorting, skip and limit the number of return operations, combination of skip and limit can achieve paging effect.

1. Add quotation marks and commas 2. Delete the comma at the end of the last line and add characters to the first and last lines 3. Database Export

Add the --auth option to mongod startup or add auth=true to the configuration file. The instance is restarted to create a common user, user1, and a database, Eva. User1 now has dbOwner privileges for database Eva.

I have been used to using Mysql database before, but I am not familiar with the command line of MongoDb. Here is a summary of the command line of MongoDb, which can be easily referred to in the future. Database operation 2. Set operation 3. Document operation obj indicates the object to be updated.

Change let db=mongoose. Connect ('mongodb://web:[email protected]:27017/web') in server/db.js.

This is the 28th day of my participation in the August More Text Challenge. Connect database clear screen view all database list 2. Create database, view, delete database use database, create database if you really want to create this database successfully, then