Aneesha S

Aneesha S

MongoDB Select Count And Group By

Mongodb Count Group Select Featured Image

In this tutorial, we will discuss the MongoDB select, count, and group by aggregate stages. The aggregate count and group stage together return the number of documents in a group. We will see an example for this topic in this…

Sharding in MongoDB: Explained in Detail

Sharding In MongoDB Featured Image

In this tutorial, we will learn about sharding in MongoDB. It is time we learn an intermediate-level topic. Sharding in MongoDB is one such topic. Now, sharding in layman’s terms means that mechanism that stores data on multiple machines. This…

Error Testing Smart Contract in Solidity Ethereum

Error Testing Smart Contracts Featured Image

In this tutorial, I will teach you how to perform error testing for your smart contract in Solidity. Error testing is a crucial aspect of development especially when it comes to blockchain development. Unlike development using other technologies, blockchain technology…

findOneAndUpdate() and findAndModify() in MongoDB

FindOneAndUpdate And FindAndModify Featured Image

A MongoDB database has multiple collections. These collections can store millions of documents(data in MongoDB is called a document). MongoDB has various methods to fetch the documents from a collection such as find(), findOne(), findOneAndUpdate(), etc. We already have covered…