Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{name:{first:"doc1"},moniker:{first:"doc1",},arr:[1,2],},{name:{first:"doc2",},moniker:{first:"doc3",},arr:[3,3],}]
Query
db.collection.find({$expr:{$eq:["$name.first","$moniker.first"]}})
Result