获取mongodb集合的最新记录 [英] Get the latest record from mongodb collection

问题描述

我想知道集合中的最新记录.该怎么做?

I want to know the most recent record in a collection. How to do that?

注意:我知道以下命令行查询有效:

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)

在idate处添加了时间戳.

where idate has the timestamp added.

问题是收集需要更长的时间才能取回数据，而我的测试"收集确实非常庞大.我需要一个具有恒定时间响应的查询.

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.

如果有更好的mongodb命令行查询，请告诉我.

If there is any better mongodb command line query, do let me know.

推荐答案

这是对先前答案的重新阐述，但更可能适用于不同的mongodb版本.

This is a rehash of the previous answer but it's more likely to work on different mongodb versions.

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

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