“Knowledge is power.” – Francis Bacon

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. …

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In this guide, I will explain how to query non-null values in MongoDB. To query for is not null value, we can use the $ne operator as well as the $eq operator and specify the desired value that we want to query for. This guide aims to provide readers with different ways and examples for …

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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 …

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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 …

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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 …

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In this guide, I am going to cover the $size operator in MongoDB. The $size operator in MongoDB helps us match any array that matches the number of elements given by the argument. It works with the find operation. This guide aims to provide examples so it is easier for you to use the $size …

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In this tutorial, I will discuss the filtered positional operator in MongoDB. The filtered positional operator in MongoDB, denoted as $[] 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 …

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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() …

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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 …

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