How to remove a field completely from a MongoDB document?

Question

{ 

name: 'book', 

tags: { 

words: ['abc','123'], 

lat: 33, long: 22 

} 

}

Suppose this is a document. How do I remove "words" completely from all the documents in this collection? I want all documents to be without "words":

{ 

name: 'book', 

tags: { 

lat: 33, 

long: 22 

} 

}

Answer 1

You can use the below-mentioned code to remove a field completely from a MongoDB document:-

db.example.update({}, {$unset: {words:1}}, false, true);