MongoDB Database Common Operations

1. Delete a field in the document

db.< Collection Name >.update ({$unset1}} for the condition of one or some of the fields}

2. Add a field to the document

db.< Collection name >.update ({Check the condition of one or some fields},{$set: {Field name: Field value}})

Of course, this method is generally used to modify the value of the field, but if the field does not exist, then the field will be created automatically.

MongoDB Database Common Operations