Mongo shell interactive command window

mongo shell yes MongoDB Interactive command window . have access to mongo shell operation MongoDB, for example ： Yes MongoDB Carry on all kinds of CRUD operation . MongoDB It comes with you when you install it mongo shell, No need to install it separately .

Tips ： The following chapters , The main use of mongo shell Command and api Introduce MongoDB Various operations , If you use programming language or visual MongoDB Compass operation MongoDB, Their grammar is similar , So just master mongo shell The grammar of , You know how to use other tools .

start-up mongo Shell And connect to MongoDB

Connect local MongoDB Server

Direct input mongo command , You can enter Mongo Shell

mongo

Use the default address to connect MongoDB Server

Tips ： If the prompt cannot be found mongo command , That means installation MongoDB When , No will MongoDB Of bin Directory added to PATH environment variable , For details, please refer to the previous installation chapter .

If successful, the following information will be output ：

MongoDB shell version v4.4.5
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("b11bfc3e-e70c-42b1-9bfc-5d9218f2d232") }
MongoDB server version: 4.4.5
>

In the interactive window , Enter the operation command .

Get into docker In container mongo shell

If , We use docker install MongoDB The name of the container is mongo, Then use the following command to directly enter mongo shell

docker exec -it mongo mongo

Connect remote MongoDB Server

mongo --username root --password  --host mongodb0.examples.com --port 28015

Parameter description ：

• —username Set up MongoDB Account No root
• —password You will be prompted to enter the password
• —host Appoint mongodb Server address
• —port Appoint MongoDB Server Port number

mongo shell Basic command

Displays the name of the database currently in use

db

Switch to another database

Format ：
use Database name

use tizi365

mongo shell Operation example

//  Switch database 
use myNewDatabase

//  Insert a piece of data 
db.myCollection.insertOne( { x: 1 } );

//  Inquire about inventory Gather all the data 
db.inventory.find( {} )

//  Inquire about inventory aggregate ,status = "D" Document data 
db.inventory.find( { status: "D" } )

added mongo Shell Operation command , It will be introduced in the following chapters .

sign out mongo shell