Kumar Saurabh

Counting documents sounds like a one-liner until a report wants totals per state, per status and per date range at once. MongoDB gives you countDocuments(), estimatedDocumentCount(), the aggregate $count stage and $group, and each fits a different job. In this tutorial, I’ll cover each MongoDB aggregate count pattern on one small orders collection, with real … Read more >>

In this MongoDB tutorial, I will explain how I managed to resolve the error “Failed to set up listener: socketexception: address already in use MongoDB”. Socketexception: address already in use MongoDB When I run the command mongod in my terminal I get the following error message: From the error, It is clear that the address or … Read more >>

In this MongoDB tutorial, we will understand how to get collection size in MongoDB. Furthermore, We will cover the following list of topics: MongoDB get collection size MongoDB get collection size example MongoDB get size of a document from collection MongoDB get collection size in GB MongoDB get collection size in Ubuntu MongoDB get collection size using … Read more >>

In this MongoDB tutorial, we will discuss the $in operator MongoDB. Additionally, we will also discuss the various examples where we will use the $in operator in MongoDB. $in MongoDB The $in operator in MongoDB is used to select the documents where the value of a field is equal to any value in the specified array. Syntax: … Read more >>

In this MongoDB tutorial, we will understand the Current date in MongoDB. We will cover this topic with different operations and examples. Furthermore, the following topics will cover: The current date in the MongoDB query In this topic, you will learn to create the current date field in MongoDB. The following two ways return date as a … Read more >>

In this MongoDB tutorial, we are going to discuss “display MongoDB data in HTML”. Additionally, we will also discuss the following topics: Display MongoDB data in HTML In this topic, you will learn the display MongoDB data in HTML. Let’s understand the theory behind displaying MongoDB data in HTML Between the HTML presenting your data and your … Read more >>

In this MongoDB tutorial, we will understand distinct query in MongoDB. We will cover this topic with different operations and examples. Additionally, we will also discuss the following topics: Distinct query in MongoDB MongoDB finds the distinct values for a defined field over a single collection. The distinct method will return a document that contains an array … Read more >>

In this MongoDB tutorial, we will understand how to find documents by id in MongoDB. We will cover this topic with different operations and examples. Additionally, we will also discuss the following topics: MongoDB find by id query In MongoDB, you can use the find() method to retrieve the documents from the collection. Syntax: This query … Read more >>

In this MongoDB tutorial, I will explain how I managed to resolve the error “MongoDB data directory /data/db not found”. We will cover the solution of this by using the different operating systems. MongoDB data directory /data/db not found in windows Recently, when I installed the MongoDB database in the Windows operating system. I didn’t find any … Read more >>