mongodb-beginner

access container ==> docker exec -it bash

inside the container, access mongosh ==> mongosh mongodb://localhost:27017 -u root -p root

DB

show dbs create db ==> use <db_name>

db.help() db.getName()

db.dropDatabase()

db.createCollection("<collection_name>") show collections db.collection.drop()

paste BSON, then: db..insertOne({document}/variable) db..insertMany([array-of-documents])

db..countDocuments()

db..find({}, {}).pretty()

"projection" is what I want to return 1 - to return 0 - not to return

Ex: db.student.find({name: 'ph'}, {age: 1})

db.student.update({_id: ObjectId('662af403d397eae14fc934df')}, {$set: {name: "ph2}})

db.student.update({_id: ObjectId('662af403d397eae14fc934df')}, {$unset: {age: 1}})

db.student.deleteOne({})

if empty, will delete one document

db.student.deleteMany({age: 22})

if empty, will delete all documents