Created
September 25, 2014 06:29
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| db.messages.aggregate([ | |
| {$project: {from:"$headers.From", to:"$headers.To"}}, | |
| {$unwind:"$to"}, | |
| {$group: { _id:{_id: "$_id", from: "$from"}, to: {$addToSet:"$to"} }}, | |
| {$unwind:"$to"}, | |
| {$group: { _id: {from:"$_id.from", to:"$to"}, count: {$sum:1}}}, | |
| {$sort:{count:-1}} | |
| ]) |
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