Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{v:100.98},{v:{"$numberDecimal":"99.95"}},{v:{"$numberDecimal":"100.02"}}]
Query
db.collection.aggregate({"$group":{"_id":null,"tot":{"$sum":"$v"}}})
Result