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This article will introduce the findOneAndUpdate() method in MongoDB. We will use this method to update the first matching and embedded document. Using findOneAndUpdate() method in MongoDB db.collection.findOneAndUpdate() Method updates the...

If you are a database administrator, you are probably familiar with duplicate entries. Duplicate entries are a common problem in database management. In this article, we will see how to remove duplicate entries in MongoDB, and we will also...

This article will discuss the $set and $setOnInsert operations. In addition, the issue of adding fields to a collection in MongoDB is also briefly explained using these two operators. $set operator in MongoDB The $set operator changes the v...

This article will discuss the issue of deleting collections in MongoDB. The following are different ways to delete collections in MongoDB. MongoDB delete collection There are two ways to delete a collection in MongoDB. After running the dro...

Sometimes, we need to find a document by comparing two fields. For example, we may need to consider both the sequence number and the ID number when selecting documents in a MongoDB collection; we will see this later in this tutorial. In thi...

This article is dedicated to helping you use the mongoimport command, which allows users to import CSV files into a database in MongoDB. This article explains what a CSV file is. An example CSV file is provided at the beginning to help you...

In MongoDB, it is not mandatory for all documents to contain the same fields. Now, if you want to get all the documents in a MongoDB collection that contain only a specific field, then you may need to specify a common field as an index. Thi...

Today, we will learn how to find a value in a PostgreSQL string and select it if it matches certain conditions. Suppose you have a string carabc and want to see if it contains a value car . Therefore, you will try to use a function that tel...

PostgreSQL , also known as Postgres, is a leading object-relational database system. It is popular because it is highly compliant with the SQL standard and includes additional features that simplify processing complex data sets at scale. Po...

Sometimes, we need to find a specific document using special properties like string length. In this article, we will see how to find a specific document using string length in MongoDB, and we will also see an example on this topic for easy...

In this article, we will learn how to query nested objects in MongoDB. Querying nested objects in MongoDB MongoDB provides read operations to retrieve embedded or nested data from a collection or to search for embedded or nested documents....

In this article, case insensitive queries are discussed briefly and in detail. Also, case insensitive search queries are explained in detail. This article discusses the following topics. Case-insensitive search Improve case-insensitive regu...

When working with projects where you need to validate the size of an array or find elements whose size is greater or less than a certain length, you might use MongoDB operators such as $size, $where, $exists, etc. The methods discussed belo...

In this article, we will address how to use the MongoDB distinct() method to return unique values. In addition, returning unique values ​​in arrays and fields is discussed. In MongoDB, sometimes you may want to present or return unique...

This MongoDB tutorial article will explain Date() the methods. This article introduces different ways to query using dates. Date() Method in MongoDB Date() The method returns the date as a string or a Date object. In the MongoDB shell or mo...