Here’s a cheat-sheet for basic database management and manipulation in MongoDB.

Check for mongo process

ps -ef | grep mongo

Show DBs

show dbs

Create & Use DB

use DATABASE_NAME

Drop DB (must switch to it)

db.dropDatabase()

Check Current DB

db

Create Collection

db.createCollection("COLLECTION_NAME") db.colectionName.insertOne({ keyvalue_1: value, keyValue_2: value, .............. })

Show Collections

show collections

Drop Collection

db.COLLECTION_NAME.drop()

Insert

db.COLLECTION_NAME.insert(document) db.COLLECTION_NAME.insert({ _id: ObjectId(7df78ad8902c), title: 'MongoDB Overview', description: 'MongoDB is no sql database', by: 'tutorials point', url: 'http://www.tutorialspoint.com', tags: ['mongodb', 'database', 'NoSQL'], likes: 100 }) db.COLLECTION_NAME.insert([ { title: 'MongoDB Overview', description: 'MongoDB is no sql database', by: 'tutorials point', url: 'http://www.tutorialspoint.com', tags: ['mongodb', 'database', 'NoSQL'], likes: 100 }, { title: 'NoSQL Database', description: 'NoSQL database doesn't have tables', by: 'tutorials point', url: 'http://www.tutorialspoint.com', tags: ['mongodb', 'database', 'NoSQL'], likes: 20, comments: [ { user:'user1', message: 'My first comment', dateCreated: new Date(2013,11,10,2,35), like: 0 } ] } ]) db.COLLECTION_NAME.insertOne({key: "value"})

Find

db.COLLECTION_NAME.find() db.COLLECTION_NAME.find({key1:value1, key2:value2}) Find without id: db.COLLECTION_NAME.find({}, {key1: value1, _id: 0}) Find one document: db.COLLECTION_NAME.findOne({key: value})

Pretty Response Find

db.COLLECTION_NAME.find().pretty() db.COLLECTION_NAME.find({key1:value1, key2:value2}).pretty()

Update

db.COLLECTION_NAME.update(SELECTIOIN_CRITERIA, UPDATED_DATA) db.COLLECTION_NAME.updateOne db.COLLECTION_NAME.updateMany db.COLLECTION_NAME.update({'title':'MongoDB Overview'},{$set:{'title':'New MongoDB Tutorial'}})

Save

db.COLLECTION_NAME.save({_id:ObjectId(),NEW_DATA}) db.COLLECTION_NAME.save( { "_id" : ObjectId(5983548781331adf45ec7), "title":"Tutorials Point New Topic", "by":"Tutorials Point" } )

Delete collection:

db.COLLECTION_NAME.deleteOne({ _id: ObjectId("documentID")}) db.COLLECTION_NAME.deleteMany({}) - will delete all documents in collection