Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"_id":"12345","Name":"Joe Bloggs","Class_Grade":"b","Homework_Grade":"c"}]
Query
db.collection.update({},[{$set:{Grades:{"Class_Grade":"$Class_Grade","Homework_Grade":"$Homework_Grade"}}}])
Result