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check if duplicate value exists mongodb

#KMJ answered on December 8, 2021 Popularity 8/10 Helpfulness 5/10

answer check if duplicate value exists mongodb

check if duplicate value exists mongodb

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db.collection.aggregate([
    {"$group" : { "_id": "$name", "count": { "$sum": 1 } } },
    {"$match": {"_id" :{ "$ne" : null } , "count" : {"$gt": 1} } }, 
    {"$project": {"name" : "$_id", "_id" : 0} }
]);

Popularity 8/10 Helpfulness 5/10 Language whatever

Source: stackoverflow.com

Tags: exists mongodb whatever

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Contributed on Dec 08 2021

#KMJ

0 Answers Avg Quality 2/10

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check if duplicate value exists mongodb

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