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MongoDB Cheat Sheet

MongoDB Cheat Sheet

Show All Databases

show dbs

Show Current Database

db

Create Or Switch Database

use acme

Drop

db.dropDatabase()

Create Collection

db.createCollection('posts')

Show Collections

show collections

Insert Row

db.posts.insert({
  title: 'Post One',
  body: 'Body of post one',
  category: 'News',
  tags: ['news', 'events'],
  user: {
    name: 'John Doe',
    status: 'author'
  },
  date: Date()
})

Insert Multiple Rows

db.posts.insertMany([
  {
    title: 'Post Two',
    body: 'Body of post two',
    category: 'Technology',
    date: Date()
  },
  {
    title: 'Post Three',
    body: 'Body of post three',
    category: 'News',
    date: Date()
  },
  {
    title: 'Post Four',
    body: 'Body of post three',
    category: 'Entertainment',
    date: Date()
  }
])

Get All Rows

db.posts.find()

Get All Rows Formatted

db.posts.find().pretty()

Find Rows

db.posts.find({ category: 'News' })

Sort Rows

# asc
db.posts.find().sort({ title: 1 }).pretty()
# desc
db.posts.find().sort({ title: -1 }).pretty()

Count Rows

db.posts.find().count()
db.posts.find({ category: 'news' }).count()

Limit Rows

db.posts.find().limit(2).pretty()

Chaining

db.posts.find().limit(2).sort({ title: 1 }).pretty()

Foreach

db.posts.find().forEach(function(doc) {
  print("Blog Post: " + doc.title)
})

Find One Row

db.posts.findOne({ category: 'News' })

Find Specific Fields

db.posts.find({ title: 'Post One' }, {
  title: 1,
  author: 1
})

Update Row

db.posts.update({ title: 'Post Two' },
{
  title: 'Post Two',
  body: 'New body for post 2',
  date: Date()
},
{
  upsert: true
})

Update Specific Field

db.posts.update({ title: 'Post Two' },
{
  $set: {
    body: 'Body for post 2',
    category: 'Technology'
  }
})

Increment Field ($inc)

db.posts.update({ title: 'Post Two' },
{
  $inc: {
    likes: 5
  }
})

Rename Field

db.posts.update({ title: 'Post Two' },
{
  $rename: {
    likes: 'views'
  }
})

Delete Row

db.posts.remove({ title: 'Post Four' })

Sub-Documents

db.posts.update({ title: 'Post One' },
{
  $set: {
    comments: [
      {
        body: 'Comment One',
        user: 'Mary Williams',
        date: Date()
      },
      {
        body: 'Comment Two',
        user: 'Harry White',
        date: Date()
      }
    ]
  }
})

Find By Element in Array ($elemMatch)

db.posts.find({
  comments: {
     $elemMatch: {
       user: 'Mary Williams'
       }
    }
  }
)

Add Index

db.posts.createIndex({ title: 'text' })

Text Search

db.posts.find({
  $text: {
    $search: "\"Post O\""
    }
})

Greater & Less Than

db.posts.find({ views: { $gt: 2 } })
db.posts.find({ views: { $gte: 7 } })
db.posts.find({ views: { $lt: 7 } })
db.posts.find({ views: { $lte: 7 } })
@datmt
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datmt commented Aug 23, 2022

Thanks! I also created some cheat sheets here covering crud/aggregation too https://datmt.com/series/mongodb-cheat-sheets/

@Richard-vinu
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thank you!

@rohit-patel-azilen
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Thank you very much!..A great reference for beginners.

@RiyaadHossain
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Thank a lot

@1002jpvc
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Thank You BRAD

@ShandanaShahid
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Thankyou

@Ogden777
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Ogden777 commented Nov 7, 2022

Сенкью

@phieraditya
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Thank you @bradtraversy

I use mongosh with MongoDB 6.0.1, and some methods in the cheat sheet are deprecated. Here is what works with my version:

Get All Rows Formatted

db.posts.find()

already formatted without pretty()

Count Rows

db.posts.countDocuments()
db.posts.countDocuments({ category: ‘News' });

count() is deprecated

Update Specific Field

db.posts.updateOne({ title: 'Post Two' },
{
  $set: {
    body: 'Body for post 2',
    category: 'Technology'
  }
})

update() is deprecated

Delete Row

db.posts.deleteOne({ title: 'Post Four' })

remove() is deprecated

@fughesi
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fughesi commented Nov 16, 2022

Epstein didn't kill himself

@Raj-Dave-1
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Thank You!

@pxzxj
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pxzxj commented Dec 1, 2022

Thank You!

@sabriallegui
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thank you!

@LoaiMasri1
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LoaiMasri1 commented Jan 1, 2023

Thank You!

@Yehan20
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Yehan20 commented Jan 11, 2023

Thanks sir

@Haideraliamjad
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Thanks for this amazing documentation

@glebstrunnikov
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I'm not sure why but the thing with text search by index doesn't work, I even tried to use the exact same commands as in this sheet, but on
db.posts.createIndex({ title: 'text' })
i get just
title_text
and then

db.friends.find({
    $text: {
        $search: "\"V\""
    }
})

gives me an empty line. I'm using the mongosh 1.6.2.0 version

Thanks for a great tutorial anyway

@hilako
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hilako commented Feb 26, 2023

Small fixes I've made to this great document:
https://gist.github.com/hilako/d6217d7c64980eee424262a0d8ad0973
Thanks :-)

@Pawanxyz
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Nice

@Mukul9913
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nice

@thegreatmick1975
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Awesome thank you

@MamadouAlySy
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thanks a lot :)

@eren-1234-yeager
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This help me a lot :)

@projectsworldx
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Just plain and simple.. Loved it

@Richard-vinu
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nice

@MoeinDeveloper92
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I am really thankful for living at this period of the history. Life by means of people like Brad is more beautiful.

@bhartik021
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Index Management:

MongoDB allows you to manage indexes to improve query performance. You can list and drop indexes on collections.

List Indexes:
db.posts.getIndexes()

Drop Index:
db.posts.dropIndex({ title: 1 })

@Muhammad-Qzih
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Thanks!

@sandesh300
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good work

@kendali
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kendali commented Dec 27, 2023

thank you

@davidwr
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davidwr commented Feb 12, 2024

Very helpful, thanks!

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