Introduction When working with databases, data retrieval is the most used operation of all the CRUD operations. When working with mongoose and MongoDB, documents of a collection can be retrieved using various methods. In this article, we will discuss such methods of retrieving documents from a collection in MongoDB. Let’s jump in and learn how … Continued
Introduction Deleting data from a database is a critical operation. Delete operations should be performed carefully. There is no margin for error. Mongoose provides two delete methods for deleting documents from a MongoDB collection. They are deleteOne() and deleteMany(). In this article, we will discuss these methods for deleting documents in mongoose. We will delete … Continued
Introduction If you have ever worked with MongoDB, you would have definitely used the insert() method to insert data documents in a collection. This method is the most common method used to insert data into a MongoDB collection. But when using mongoose, the insert() method does not work. Why? simply, because it doesn’t exist in … Continued
Introduction MongoDB stores its data (known as “documents”) by grouping them in collections that are themselves stored in a database. This article will help you to create database and collection names for a MongoDB server, and then it will help you to retrieve the database and collection names, in Python, with some example code. Prerequisites … Continued
Introduction Sorting is always helpful. Sorting documents of a collection can be useful. Using mongoose, we can get an output where all the documents are sorted in an order. The order can be ascending or descending. We can specify the order. The documents can be sorted according to a single field or even, we can … Continued
Introduction Deletion is an important part of CRUD operations in any database. In MongoDB, we can delete a single document, or multiple documents, or even we can delete an entire collection. Delete operations can also be performed in mongoose to delete documents in a collection. One such method is deleteMany() method. In this article, we … Continued
Introduction There can be any number of documents in a collection. There is no limit for that. In our mongoose code, we may need to know how many documents are present in a particular collection. Or we may need to know how many documents are there with the same value for a particular field. Of … Continued
Introduction Working with documents is one prime task in MongoDB. But collections store these documents. Handling collections is also one important part in MongoDB. There are few methods provided by mongoose that can be used to work with collections. One of these methods is the dropCollection() method. This method is used to delete a collection … Continued
Introduction There has been so much talk lately about MapReduce and how it can help developers process large data sets into useful aggregated results. In this tutorial, we are going to show you some examples using the MapReduce() function on a MongoDB collection. MapReduce is broken down into two phases: The map phase filters out … Continued
Introduction Mongoose is often used with NodeJS and MongoDB. Mongoose is an Object Data Modeling library that is used to create an environment for data. It provides many functions to make it easy to work with data and MongoDB. While working with databases, data fetching is one of the most commonly used operations. Functions such … Continued
