Slide 24
Slide 24 text
> db.amigos.aggregate([{"$group": {"_id":
"$nome", "qtd": {"$sum": 1}}}])
> db.amigos.aggregate([{"$unwind": "$cores"},
{"$group": {"_id": "$cores", "qtd": {"$sum":
1}}}])
> db.amigos.aggregate([{"$unwind": "$cores"},
{"$group": {"_id": "$cores", "qtd": {"$sum":
1}}}, {"$project": {"_id": 0, cores: "$_id",
qtd: 1}}])
DB.COLLECTION.AGGREGATE()
APLICAÇÕES PHP COM MONGODB