Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"key":1},{"key":2},{"key":3},{"key":4},{"key":50},{"key":6},{"key":7}]
Query
db.collection.aggregate([{$addFields:{found:{$in:["$key",[1,3,5,7]]}}}])
Result