How we can create an Index on MongoDB?

Question

I want to create Index on Mongo database for performance perspective, so could you please help me how I can do it?

Your help will be appreciated here.

Answer 1

To create an index on MongoDB you can use the below-mentioned query:

db.collection.createIndex(keys, options)

So, for example:

$ db.users.createIndex({"username" : 1})