Created
March 17, 2018 05:59
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mongo remove reciplicated data
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| db.comments_copy.aggregate([ | |
| { | |
| $group: { _id: {mid: '$mid',content: '$content'},count: {$sum: 1},dups: {$addToSet: '$_id'}} | |
| }, | |
| { | |
| $match: {count: {$gt: 1}} | |
| } | |
| ]).forEach(function(doc){ | |
| doc.dups.shift(); | |
| db.comments_copy.remove({_id: {$in: doc.dups}}); | |
| }) |
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