Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"id":"f3fd1b6c","originalVersion":"v2","timestamp":ISODate("2020-03-27T13:28:09.883+00:00")}]
Query
db.collection.find({$expr:{$eq:[{$month:"$timestamp"},3]}})
Result