Fetch specific documents with array values in MongoD

To fetch specific documents, use limit() along with toArray(). The toArray() method returns an array that contains all the documents from a cursor. Let us create a collection with documents −

> db.demo482.insertOne({_id:1,"StudentInformation":[{"Name":"Chris","Age":21}]});
{ "acknowledged" : true, "insertedId" : 1 }
> db.demo482.insertOne({_id:2,"StudentInformation":[{"Name":"Bob","Age":23}]});
{ "acknowledged" : true, "insertedId" : 2 }
> db.demo482.insertOne({_id:3,"StudentInformation":[{"Name":"David","Age":20}]});
{ "acknowledged" : true, "insertedId" : 3 }

Display all documents from a collection with the help of find() method −

> db.demo482.find();

This will produce the following output −

{ "_id" : 1, "StudentInformation" : [ { "Name" : "Chris", "Age" : 21 } ] }
{ "_id" : 2, "StudentInformation" : [ { "Name" : "Bob", "Age" : 23 } ] }
{ "_id" : 3, "StudentInformation" : [ { "Name" : "David", "Age" : 20 } ] }

Following is the query to fetch specific documents with limit() −

> db.demo482.find({}).limit(2).toArray();

This will produce the following output −

[
   {
      "_id" : 1,
      "StudentInformation" : [
         {
            "Name" : "Chris",
            "Age" : 21
         }
      ]
   },
   {
      "_id" : 2,
      "StudentInformation" : [
         {
            "Name" : "Bob",
            "Age" : 23
         }
      ]
   }
]