Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"key":1,time:1},{"key":2,time:2},{"key":2,time:3},{"key":2,time:5},{"key":3,time:4},{"key":3,time:7}]
Query
db.collection.find({key:{$in:[1,2,3]}})
Result