delete duplicate records mongo
db.test.ensureIndex({name: 1, nodes: 1}, {unique: true, dropDups: true})delete duplicate records mongo
db.test.ensureIndex({name: 1, nodes: 1}, {unique: true, dropDups: true})delete duplicate records mongo
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})Copyright © 2021 Codeinu
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