Simple CRUD Operations in MongoDB

A Beginner-Friendly Guide with Practical Examples

Introduction

CRUD stands for Create, Read, Update, and Delete. These are the basic operations performed in any database, including MongoDB. In this post, we’ll learn how to perform CRUD operations step by step using the MongoDB Shell (mongosh).

Keywords:

MongoDB, CRUD, NoSQL, Insert, Find, Update, Delete, MongoDB shell, database commands

Step 1: Switch to Your Database

First, open your mongosh terminal and select your database:

use mydb

Step 2: Create (Insert Data)

Insert One Document:

db.users.insertOne({
  name: "Champak",
  age: 52,
  city: "Varanasi"
})

Insert Multiple Documents:

db.users.insertMany([
  { name: "Amit", age: 25, city: "Delhi" },
  { name: "Priya", age: 28, city: "Mumbai" }
])

Step 3: Read (Find Data)

Find All Documents:

db.users.find()

Find Specific Document (by Name):

db.users.find({ name: "Champak" })

Pretty Print Results:

db.users.find().pretty()

Step 4: Update Data

Update One Document:

db.users.updateOne(
  { name: "Champak" },
  { $set: { age: 23 } }
)

Update Multiple Documents:

db.users.updateMany(
  { city: "Delhi" },
  { $set: { city: "New Delhi" } }
)

Step 5: Delete Data

Delete One Document:

db.users.deleteOne({ name: "Amit" })

Delete Multiple Documents:

db.users.deleteMany({ city: "Mumbai" })

Step 6: Dropping a Collection

To delete the entire users collection:

db.users.drop()

Step 7: Dropping the Entire Database

Warning: This will delete the entire database:

db.dropDatabase()

Step 8: Viewing Databases and Collections

Show All Databases:

show dbs

Show All Collections in Current DB:

show collections

Conclusion

With these simple CRUD operations, you’ve taken your first step in working with MongoDB. You can now create, read, update, and delete data from your NoSQL databases easily.

✅ Want a follow-up post on how to connect MongoDB with Node.js or Python? Let me know in the comments!