MongoDB Glossary - Upsert
In the world of databases, MongoDB has gained significant popularity due to its flexibility, scalability, and ease of use. As a NoSQL database, MongoDB offers a wide range of features and functionalities that make it a preferred choice for many developers and businesses. One such feature is "upsert," which stands for "update or insert." In this article, we will explore what upsert means in the context of MongoDB and how it can be beneficial for your database operations.
Understanding Upsert
Upsert is a combination of two operations: update and insert. It allows you to update an existing document in a collection or insert a new document if the specified document does not exist. In traditional databases, you would need to check if a document exists before deciding whether to update or insert. However, MongoDB simplifies this process by providing a single operation that handles both scenarios.
When performing an upsert operation, MongoDB uses a query to identify the document to be updated or inserted. If the query matches an existing document, MongoDB updates the document based on the specified update criteria. On the other hand, if the query does not find a matching document, MongoDB inserts a new document with the specified data.
Upsert Syntax
The syntax for performing an upsert operation in MongoDB is as follows:
db.collection.update(
 