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

Question

Is there a simple way to do this?

Answer 1

At the moment there is no command in MongoDB that would do this. Please note the JIRA ticket with related feature request.

You could do something like:

db..find().forEach(function(d){ db.getSiblingDB('')[''].insert(d); });

Please note that with this, the two databases would need to share the same mongod for this to work.

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