Template
single collection
multiple collections
mgodatagen
update
indexe
explain
Stage
Database
bson
mgodatagen
[{"L5_tecnologias":{"JAVA":""}},{"L5_tecnologias":{"CSharp":""}},{"L5_tecnologias":{"JAVA":""}}]
Query
db.collection.find({"L5_tecnologias.JAVA":{$exists:true}})
Result