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I want to know the most recent record in a collection. How to do that?
Note: I know the following command line queries works:
1. db.test.find().sort({"idate":-1}).limit(1).forEach(printjson);
2. db.test.find().skip(db.test.count()-1).forEach(printjson)
where idate has the timestamp added.
The problem is longer the collection is the time to get back the data and my 'test' collection is really really huge. I need a query with constant time response.
If there is any better mongodb command line query, do let me know.