How does MongoDB order their docs in one collection?

Question

I just want to know that on what order each document follows in MongoDB collection?

Answer 1

The $natural argument returns items according to their natural order within the database. This natural ordering is considered to be an internal implementation feature in MongoDB. It reflects the insertion order with the following exception for the MMAPv1 storage engine. If you want "sorted" then you should perform an explicit "sort":

 db.collection.find().sort({ "_id": 1 })

Or if you want a "natural" sort means in the order stored on disk:

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db.collection.find().sort({ "$natural": 1 })