Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{_id:123,name:"xyz",attrib:{address:"123 xyz rd",phone:"123-456-7890"}}]
Query
db.collection.update({},{$rename:{"attrib.address":"address","attrib.phone":"phone"}},{multi:true})
Result