Aneesha S

Suppose you got the job of managing all the schools in your city. You have created a collection of schools which contains all the school names, locations etc. Also, each school has its own MongoDB collection which includes course names, timings, fees etc.  Now you need to populate each school’s data into your main school

As a MERN fan, we all have a favourite database, MongoDB. While working with it we usually use the find() method to select or query multiple documents, on the other hand, we use findOne() to get one.  We can also use this findOne() with an ID passed as a query to select that specific ID-contained

It is common to use arrays as field values in MongoDB documents to store different types of data. Let’s say we have a collection of colleges where each document represents a different college and each contains an array having different courses the college offers. Now suppose we have to perform some kind of analysis operation

MongoDB is a NoSQL database that can store a large amount of unstructured data. Data stored in MongoDB are easy to retrieve as it can hold them in flexible formats depending upon the need such as graphs, key values, documents, etc. A MongoDB database has many collections in which we can insert records, the records

MongoDB can store huge amounts of data and sometimes while inserting data in bulk some fields that we want to remove earlier remain there and are inserted in the database with empty or some values. Deleting these fields from all documents using some ordinary method can be painful. So here comes another extremely useful MongoDB

In MongoDB, we can export data to a variety of files which provides a convenience for the external programs to interact with it. Common file types in which data can be exported are TSV, CSV, BSON, and JSON. MongoDB allows developers to achieve this export feature with the help of mongoexport tool. This tool must

Suppose you have created a schema for storing data and stored some data based on it. Later any time you want to change the field name, well, you can easily do it manually in the schema, but you cannot edit the large amount of stored data field names manually and you also can’t leave them,

You may heard about the JavaScript pop() method used to pop or remove elements from an array. Similarly, MongoDB has a $pop operator that provides similar functionality of removing an element from an array.  But, there is a catch here, you can not just simply use this operator to remove any element from an array,