$set operator in MongoDB is used to update an existing field with a new val

In mongodb how do you use $set to update a nested value?

Question Posted / Kuldeep Krishna

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Answer Posted / Kuldeep Krishna

$set operator in MongoDB is used to update an existing field with a new value. To update a nested value, you can dot notation or array indexing. Example: `db.collection.updateOne({}, {$set: {'nested.field': 'new_value'}})`

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