MongoDB

Commands

• Log-
  mongo -u <username> -p <password> --authenticationDatabase <dbname>

• Show All Databases-
  show dbs

• Select DB-
  use databaseName

• Authenticate-
  db.auth("username", "password")

• Logout-
  db.logout()

• List collections-
  show collections;
db.getCollectionNames();

• List Users-
  show users;
db.getUsers();

• List roles-
  show roles

• Create collection-
  db.createCollection("collectionName");

• Insert document-
  db.<collectionName>.insert({field1: "value", field2: "value"})
db.<collectionName>.insert([{field1: "value1"}, {field1: "value2"}])
db.<collectionName>.insertMany([{field1: "value1"}, {field1: "value2"}])

• Save or Update-
  db.<collectionName>.save({"_id": new ObjectId("jhgsdjhgdsf"), field1: "value", field2: "value"});

• Display records-
  db.<collectionName>.find();
db.<collectionName>.find().pretty();
db.<collectionName>.find().limit(10);
db.<collectionName>.find({"_id": ObjectId("someid")});
db.<collectionName>.find({"_id": ObjectId("someid")}, {field1: 1, field2: 1});
db.<collectionName>.find({"_id": ObjectId("someid")}, {field1: 0});
db.<collectionName>.count();

• Drop collections-
  db.<collectionName>.drop()