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Winning Eleven PC Game For Sale. Get games for desktop, laptop, Windows XP, Windows Vista, Windows 7, and Mac.Q:
MongoDB aggregate()
I have a collection of documents that look like this:
{"_id": 1, "sender": "0", "subject": "test", "msg": "first"}
{"_id": 2, "sender": "0", "subject": "test", "msg": "second"}
{"_id": 3, "sender": "0", "subject": "test", "msg": "third"}
And I want to get the count of all messages and group them by the sender.
Something like:
{ "sender" : "0", "count":3, "messages": [ "first", "second", "third" ]}
I would imagine that I can do something like this but don't know how to group by msg.name :
db.mycollection.aggregate( {$group: {_id: "$sender", count: {$sum:1}}}).result
Thank you!
A:
Try this:
db.mycollection.aggregate( [
{ $unwind: '$msg' },
{ $group: {_id: "$sender", count: {$sum:1}}}
]);
The Australian bush, land and wildlife have been recorded in the state of Utah.
The Australian bush, land and wildlife have been recorded in the state of Utah, where new footage of an outback sunset has been released.
American director and photographer Derek Razum, best known for documenting his journeys through the Australian bush on his “12 Months Down Under” YouTube channel, recently visited Utah for his latest project.
In the US, Razum filmed a sunset from the Corwin Arches in Utah’s Arches National Park.
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