16.Update Methods-官方文档摘录
这里没什么好说的，直接贴文了
MongoDB provides the following methods for updating documents in a collection:
db.collection.updateOne() |
Updates at most a single document that match a specified filter even though multiple documents may match the specified filter. New in version 3.2. |
db.collection.updateMany() |
Update all documents that match a specified filter. New in version 3.2. |
db.collection.replaceOne() |
Replaces at most a single document that match a specified filter even though multiple documents may match the specified filter. New in version 3.2. |
db.collection.update() |
Either updates or replaces a single document that match a specified filter or updates all documents that match a specified filter. By default, the |
Additional Methods
The following methods can also update documents from a collection:
db.collection.findOneAndReplace().db.collection.findOneAndUpdate().db.collection.findAndModify().db.collection.save().db.collection.bulkWrite().
See the individual reference pages for the methods for more information and examples.
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