Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"_id":"1","NUM":[21,24]},{"_id":"2","NUM":[25,29]},{"_id":"3","NUM":[24,26,28]}]
Query
db.collection.aggregate([{"$match":{NUM:{$elemMatch:{$gte:25,$lte:25}}}}])
Result