Unset a field from Documents
Sample of document, and you want to unset the field “affLink”.
domain.json
{ "_id" : 1,
"domain" : "mkyong.com",
"affLink" : "abc" }
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To unset a field from all documents, set {multi: true}, else only the field of the first matched document will be removed.
db.domain.update({},{$unset: {affLink:1}},{multi: true});Output
domain.json
{ "_id" : 1, "domain" : "mkyong.com" }
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