Database

In this tutorial, I will cover the $and operator in MongoDB. So, the $and operator performs an AND operation on the given array of expressions. It eventually selects ALL the documents that matched the query. This guide aims to provide readers with a detailed walkthrough on different kinds of examples on how to use the […]

In this guide, I will explain how to use the getIndexes() Function in MongoDB. A list of documents describing the existing indexes in the collection includes hidden indexes, and is returned as an array by the getIndexes() function. This guide aims to throw light on a examples that illustrate the usage of the getIndexes() function.

In this guide, I will explain to you how to use the $text operator in MongoDB. The $text operator makes room for users to perform a text search or a string search in MongoDB. We may even find a specific set of string characters or a word from a string with the help of the

In this piece, I will discuss the $all operator in MongoDB. The $all operator identifies documents whose field value is an array containing all of the specified elements. It is more or less similar to the $and operator. This guide aims to provide readers with comprehensive examples to use the $all operator. So, let us

In this guide, I am going to cover the MongoDB aggregation size operator. The aggregation size operator simply counts and returns the number of elements in an array. The aggregation size operator may accept any expression as long as it pertains to an array. If the argument specified to the operator is missing or does

In this tutorial, I will discuss the filtered positional operator in MongoDB. The filtered positional operator in MongoDB, denoted as $[<identifier>] is used to identify the array elements that match the array filter conditions during the update operation. In order to use the filtered positional operator in the update statement, the query must include an

In this article, I am going to discuss the count() function in MongoDB. The count() function in MongoDB helps us get the count of the documents inside a collection or view. It returns the count of those documents that would match a find() query for the collection or view. However, instead of performing the find()

In this guide, I will cover the MongoDB sum query operation using the $sum operator. The MongoDB sum query operation (aggregation) is simply used to calculate and return the collective sum of numeric values. It is important to note that the operation ignores non-numeric values. Moreover, if a non-existent field is passed, the operator returns

 In this tutorial, I will explain the $slice modifier in MongoDB. The $slice modifier will help us limit the number of elements to insert when we conduct a $push operation. The $slice modifier must be used in conjunction with the $each operator. Only the $slice modifier has an impact if you give an empty array