“Knowledge is power.” – Francis Bacon

As we know, MongoDB documents have the ability to possess arrays as field values, these arrays may enclose multiple elements. The $size operator can clubbed with other MongoDB methods like find(), findOne(), etc to filter documents based on the number of elements inside an array. In this article, we will explore the $size operator and […]

You must have seen that in all our articles we have mentioned the date of publishing the article right after the title. Let’s say you are also developing an application and using MongoDB as the database for your app. Now you also want to create functionality to track the current date when a particular event

MongoDB lets us create multiple users. A user can create multiple databases. A database can have multiple collections. A collection can have multiple documents. We already know how to get documents from a collection in Mongo Shell. It can be done by using find(), findOne(), like method.  However, as a beginner, we don’t usually log

We all have heard how to do pretty print in MongoDB. It is used to format the query results with a proper indentation and log more readable output. We usually do it in Mongo Shell using the pretty() function.  Even we have a dedicated article on it: Pretty Print in MongoDB, where we have shown

Suppose you have a collection of students containing lots of documents having indexes like Name, Age, Class, etc. One of the indexes or attributes in the documents is Optional Subject. For context, an optional subject is a subject people choose beyond the regular curriculum subjects.  So you want to filter students having Computer Science, Physical,