Database
[{"curl_detail":{"Curl":"some_value"},"application_detail":{"application_status":"PASS"}},{"curl_detail":{"Curl":"some_value"},"application_detail":{"application_status":"PASS"}},{"curl_detail":{"Curl":"some_value"},"application_detail":{"application_status":"PASS"}},{"curl_detail":{"Curl":"some_value"},"application_detail":{"application_status":"FAIL"}},{"curl_detail":{"Curl":"some_value"},"application_detail":{"application_status":"FAIL"}}]
Query
db.collection.aggregate([{"$group":{"_id":"$application_detail.application_status","count":{"$sum":1}}},])