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MongoDB UpsertUpsert in MongoDBUpsert is an option used for the update operation. It takes a boolean parameter and creates a document if there are no matches for the query. You can use it with the update, updateOne, replaceOne, and findAndModify methods. MongoDB OperatorDifference Between $push and $addToSet in MongoDBThis instructional post will tell you what are operators in MongoDB and how are they described. Moreover, $push and $addToSet operators are explained in brief details. Difference between $push and $addToSet is elaborated with code segments. MongoDB QueryCase Insensitive Queries in MongoDBIn this article, you will learn how to use case insensitive queries in MongoDB. Moreover, how you can improve regex case insensitive queries is also discussed in this tutorial. MongoDB MongooseDifferences Between MongoDB and MongooseIn this beginner's lesson, we'll show you how to differentiate between MongoDB and Mongoose. This article will also discuss the benefits of each.