Top "Mongodb-aggregation" questions

The MongoDB Aggregation Framework provides a means to reshape and aggregate data in MongoDB 2.2+.

group in mongo excluding null values

I have mongo query which does the group operation on the documents. I have almost got the expected results except …

mongodb mongodb-query aggregation-framework mongodb-aggregation
How to use a for loop in the mongodb shell?

How can i use a for loop in the mongo db shell? My attemps are stucking at this point: for (…

mongodb mongodb-query aggregation-framework mongo-shell mongodb-aggregation
Is it possible to do a $lookup aggregation between two databases in Mongodb?

I'm trying to do something like this: use user; db.user.aggregate([ { $lookup: { from: "organization.organization", localField: "organizationId", foreignField: "uuid", …

mongodb mongodb-query mongodb-aggregation