Retrieve field value from array of sub document

Question

I have some documents like this:

{
  \"hash\": \"14a076f9f6cecfc58339330eeb492e267f63062f6d5f669c7cdbfecf9eb4de32\",
  \"started_services\": [],
  \"deleted_file         


        

Answer 1

db.key.aggregate((
{ "$match": { 
        "datetime_int": { "$gte": 1451952000 }
        }},
{"$unwind":"$software.adobe.licenses"},
{"$project":{"key":"$software.adobe.licenses.key", "hash":1, "_id":0}}
))

outputs the following :

{ "hash" : "14a076f9f6cecfc58339330eeb492e267f63062f6d5f669c7cdbfecf9eb4de32", "key" : [ "2384723", "23888823" ] }