How to Get and Select a Collection and update many documents in the collection using Java in MongoDB?

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Updating Multiple Documents in MongoDB with Java

Efficiently managing data often requires updating several records at once. In this tutorial, we explore how to use the updateMany method in MongoDB with Java to modify multiple documents in a single operation.

Why Use updateMany?

Instead of updating documents one by one, updateMany allows you to apply a change to every document that matches your criteria. This is faster, uses fewer resources, and makes your code much cleaner!

The Two Parts of the Query

To perform a bulk update, you need two things:

• The Filter: This tells MongoDB which documents to change (e.g., all products where category is 'Electronics').
• The Update: This tells MongoDB what to change (e.g., increase the price by 10%).

Implementing in Java

Using the MongoDB Java Driver, you'll use the Filters class for your criteria and the Updates class to specify your modifications. The updateMany() method will then return an UpdateResult, allowing you to see exactly how many documents were modified.

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