Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{id:"1"},{id:"1005"},{id:"50"},{id:"110"},{id:"1157"},{id:"9"},{id:"447"},]
Query
db.collection.aggregate([{$group:{_id:"$id"}},{$sort:{_id:1}}])
Result