Created
May 20, 2016 02:03
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Agrupa registros por hora
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| db.checkins.aggregate( | |
| { "$match": {"base.cidade": "newyork", "local.nome": "Starbucks"}}, | |
| { "$project": { "h":{"$hour":"$data"} } }, | |
| { "$group":{ "_id": { "hour":"$h"}, "total":{ "$sum": 1} } }, {$sort: {"_id.hour": 1}}) |
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