MongoDB TutorialLesson 9Free preview

MongoDB Delete

This lesson is part of MongoDB · All levels

Summary

This lesson discusses deleting documents with deleteOne() and deleteMany() in mongosh. deleteOne() only deletes the first one document that fits the filter, whereas deleteMany() deletes the entire document that fits, including all collection contents when the filter is empty. The result of deletion is deletedCount showing the number of deleted documents.

Key points

Delete the first one that fits the filter
Delete all documents that fit the filter
Filter is empty on deleteMany deletes the entire collection content
DeletedCount reports the number of documents that were successfully deleted

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