Mongo Shell Commonly Used Commands and Methods Quick Reference

Mongo Shell Commonly Used Commands and Methods Quick Reference

04 Jun 2024
Intermediate
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2 min read
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MongoDB shell is an interactive JavaScript shell which help you to manage a MongoDB server. It provides a set of commands to create, update, delete and query your MongoDB database. Here is a list of commonly used commands and methods.

Command Helpers

Methods and Commands
Description
help
Show list of commonly used methods and commands with description
db.help()
Show a list of database methods with description
db.<collection>.help()
Show help on collection methods. The <collection_name> can be the name of an existing collection or a non-existing collection.
show dbs / show databases
Show a list of all mongodb databases on the server
use <db_name>
Switch from current database to <db_name>
show collections
Show a list of all collections for current database
show users
Show a list of all users for current database
show roles
Show a list of all user-defined and built-in roles for current database

Basic Shell JavaScript Operations

Operations
Description
db.<collection_name>.find()
Find all documents in the collection
db.<collection_name>.insert()
Insert a new document into the collection
db.<collection_name>.update()
Update an existing document in the collection.
db.<collection_name>.save()
Insert either a new document or update an existing document in the collection
db.<collection_name>.remove()
Delete all documents from the collection
db.<collection_name>.drop()
Completely Drops or removes the collection
db.<collection_name>.createIndex()
Create a new index on the collection if the index does not exist otherwise, the operation has no effect
What do you think?
That’s it for now! I hope you get a good idea of Mongo shell commands. I would like to have feedback from my blog readers. Your valuable feedback, question, or comments about this article are always welcome.

Read More: Top 50 MongoDB Interview Questions and Answers
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