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MongoDB Query Plan & Optimization

Indexes improve the efficiency of read operations by reducing the amount of data that query operations need to process. Create index for a collection : The index can be defined in schema of collection. Consider the following collection Accounts...

How to make group by query in MongoDb

Making a group by query in traditional database like MySQL,MySQL etc in quite easy but when its come to NoSQL like MongoDb we have to twist it a bit to get result we want : There are two ways in which you can do group by in MongoDb : a) Usi...
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