Behavior

MongoDB updateMany()

The MongoDB updateMany is used to update multiple documents in a collection that match a specified filter. This method allows us to apply updates to all documents that meet the criteria defined in the filter. In this method, if the value of upsert is set to true for the sharded collection, then we must include the full shard key in the filter/selection criteria. This method can also accept aggregation pipelines. The update operation will fail if this operation changes the size of the document. We can also use this method inside multi-document transactions....

Behavior

The MongoDB updateMany updates all documents that match the specified filter criteria. This method performs a bulk update operation, applying the specified update to each document that meets the filter conditions. It provides the ability to update multiple documents in a single command, which can significantly improve performance and reduce network overhead compared to individual updates. The operation is atomic for each document, ensuring data integrity. MongoDB updateMany supports various options, including write concerns and collation, allowing for customized and reliable updates that adhere to locale–specific rules and acknowledgment requirements from replica set members....

Examples

To understand MongoDB updateMany we need a collection called students on which we will perform various operations and queries....

Conclusion

Overall, MongoDB updateMany method in MongoDB is a fast and powerful tool for performing bulk updates on multiple documents that match a specified filter. It offers various options such as write concerns and collation to customize and ensure the reliability of the update operations....