MongodbAdditionDeletionAndModification

Mongodb storage structure: database > collection > document

Interactive

1. Turn on interactive

mongo

two。 List the databases that exist

show dbs

3. Create a database

use saber2pr

4. Create a collection in the database

db.createCollection("qwq")

5. List the collections that exist in the database

show collections

6. Insert a document into the collection

db.qwq.insert({name: "saber"})

7. Find the specified document in the collection

db.qwq.find({name: "saber"})

8. Find all documents in the collection

db.qwq.find()

9. Delete the specified document in the collection

db.qwq.remove({name: "saber"})

10. Delete all documents in the collection

db.qwq.remove({})

11. Delete the specified collection in the database

db.qwq.drop()

twelve。 Delete the specified database

use saber2pr

db.dropDatabase()