delete duplicate records mongo

Samiksha Singla answered on April 15, 2022 Popularity 10/10 Helpfulness 2/10

answer delete duplicate records mongo

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delete duplicate records mongo

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Tip Samiksha Singla 1 GREPCC

db.collection.aggregate([
{
    // only match documents that have this field
    // you can omit this stage if you don't have missing fieldX
    $match: {"fieldX": {$nin:[null]}}  
},
{
    $group: { "_id": "$fieldX", "doc" : {"$first": "$$ROOT"}}
},
{
    $replaceRoot: { "newRoot": "$doc"}
}
],
{allowDiskUse:true})

xxxxxxxxxx

db.collection.aggregate([

    // only match documents that have this field

    // you can omit this stage if you don't have missing fieldX

    $match: {"fieldX": {$nin:[null]}}

},

    $group: { "_id": "$fieldX", "doc" : {"$first": "$$ROOT"}}

},

    $replaceRoot: { "newRoot": "$doc"}

],

{allowDiskUse:true})

Popularity 10/10 Helpfulness 2/10 Language whatever

Source: stackoverflow.com

Tags: records whatever

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Contributed on Apr 15 2022

Samiksha Singla

0 Answers Avg Quality 2/10

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delete duplicate records mongo

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Tip Samiksha Singla 1 GREPCC

db.test.ensureIndex({name: 1, nodes: 1}, {unique: true, dropDups: true})

xxxxxxxxxx

db.test.ensureIndex({name: 1, nodes: 1}, {unique: true, dropDups: true})

Popularity 10/10 Helpfulness 4/10 Language whatever

Source: stackoverflow.com

Tags: records

Link to this answer
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Contributed on Apr 15 2022

Samiksha Singla

0 Answers Avg Quality 2/10

delete duplicate records mongo

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