mongodb
标签：data article bsp 3.0 bpa count gre .exe pipeline
mongodb
group = new BsonDocument
{
{ "$group",
new BsonDocument
{
{ "_id", new BsonDocument { {"Age","$Age"} ,{"Sex","$Sex" } }},
{"Count", new BsonDocument{ { "$sum", 1 } } }
}
}
};
var pipeline = new[] { group };
var result = collection.Aggregate(pipeline);