Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"_id":1,"energyConsumed":1},{"_id":2,"energyConsumed":2}]
Query
db.collection.aggregate([{"$project":{"_id":0,"midNightTimeStamp":"$_id","energyConsumed":1.0}}])
Result