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Questions - nosql-aggregation

Find duplicate values inside an array of objects in MongoDB in single record

I'm new to making queries in Mongo. I have this single record and I need to find the sections with the same link. My record: { "_id" : ObjectId("1234"), "name": &...
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Juan Manuel

arrays

mongodb

mongodb-query

duplicates

nosql-aggregation

Votes: 0

Answers: 2

Latest Answer

Edit: You can use $group: db.collection.aggregate([ {$unwind: "$sections"}, { $group: { _id: "$sections.link", orig_id: {$first: "$sections._id" }, ...
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nimrod serok

mongodb querying next N documents

In Mongodb, is it possible to query the next N documents? i.e collection.find({ 'temperature': 1.0 }).sort("datetime", 1).next({ [ 'temperature': 1.1, 'temperature': 1.2 ] }, 2) query would...
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povici

mongodb

nosql

nosql-aggregation

Votes: 0

Answers: 0

Add pipeline stage in the arguments of another pipeline - MongoDB

Is it possible to add a pipeline to the arguments of another pipeline in mongodb? An example of the current result that I am getting: MongoPlayground Is it possible to project the emp table to only na...
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Muhammad Bilal

database

mongodb

nosql

pipeline

nosql-aggregation

Votes: 0

Answers: 1

Latest Answer

You are almost there. What you seek is the pipeline version of $lookup: db.dept.aggregate([ {$lookup: {"from": "emp", let: { did: "$_id" }, pip...
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Buzz Moschetti

mongodb aggregation optimization: $sort and $group

For simple, I have a document like this: name weight_1 weight_2 aaaa 1 5 bbbb 4 4 cccc 2 3 bbbb 3 2 cccc 5 1 My goal is to output a list and sort by weight_2 asc. If there are more...
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user15963491

mongodb

query-optimization

nosql-aggregation

Votes: 0

Answers: 0

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