How to copy a collection from one database to another in MongoDB

Question

Is there a simple way to do this?

Answer 1

To copy a collection from one database to another in MongoDB there is no command in MongoDB that would do this but you can do something like as follows:-

db.<collection_name>.find().forEach(function(d){ db.getSiblingDB('<new_database>')

['<collection_name>'].insert(d); 

});

Other than this, you can do a mongodump of a collection from one database and then mongorestore the collection to the other database.