Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"id":1,"field1":1,"field2":2,"field3":3},{"id":2,"field1":1,"field2":2,}]
Query
db.collection.update({"id":1},{"$unset":{"field1":"","field3":""}})
Result