MongoDB query to fetch a specific document rom documents with field value set using NumberInt()?

The NumberInt() is used to explicitly specify 32-bit integers. Let us create a collection with documents −

> db.demo357.insertOne( ...    { ...       "FirstName" : "Chris", ...       "Age" : 21, ...       "details" : { ...          "studentDetails" : { ...             "id" : NumberInt(101) ...          } ...       } ...    } ... ); {    "acknowledged" : true,    "insertedId" : ObjectId("5e568fa6f8647eb59e5620c9") } > db.demo357.insertOne( ...    { ...       "FirstName" : "David", ...       "Age" : 23, ...       "details" : { ...          "studentDetails" : { ...             "id" : NumberInt(110) ...          } ...       } ...    } ... ); {    "acknowledged" : true,    "insertedId" : ObjectId("5e568fbaf8647eb59e5620ca") }

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

> db.demo357.find();

This will produce the following output −

{ "_id" : ObjectId("5e568fa6f8647eb59e5620c9"), "FirstName" : "Chris", "Age" : 21, "details" : { "studentDetails" : { id" : 101 } } } { "_id" : ObjectId("5e568fbaf8647eb59e5620ca"), "FirstName" : "David", "Age" : 23, "details" : { "studentDetails" : { "id" : 110 } } }

Here is the query to get specific document −

> db.demo357.find({"details.studentDetails.id":NumberInt(110)});

This will produce the following output −

{ "_id" : ObjectId("5e568fbaf8647eb59e5620ca"), "FirstName" : "David", "Age" : 23, "details" : { "studentDetails" : { "id" : 110 } } }