Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{title:"this is my title",author:"foo",posted:new Date(),pageViews:6,tags:["foo","bar","baz"]}]
Query
db.collection.aggregate({$project:{author:1,title:1,tags:1}},{$unwind:"$tags"})
Result