Clone a collection in MongoDB

Question

I want to clone a MongoDB collection and save it on the same server with a different name. So for example right now I have the following collections: demo1.categories, demo1

Answer 1

there already has a command for this.

Copy a single collection from one server to another. http://www.mongodb.org/display/DOCS/cloneCollection+Command

Answer 2

Don't use db.cloneCollection() method, it is depreciated from the current version 4.2 instead try to use mongoexport.

depreciated collection method