mongodb move documents from one collection to another collection

Question

How can documents be moved from one collection to another collection in MongoDB?? For example: I have lot of documents in

Answer 1

From MongoDB 3.0 up, you can use the copyTo command with the following syntax:

db.source_collection.copyTo("target_collection")

Then you can use the drop command to remove the old collection:

db.source_collection.drop()