Fetch specific multiple documents in MongoDB

To fetch specific multiple documents in MongoDB, use $in. Let us create a collection with documents −

> db.demo593.insertOne({id:1,"Name":"Chris"});{    "acknowledged" : true, "insertedId" : ObjectId("5e93177dfd2d90c177b5bcd9") } > db.demo593.insertOne({id:2,"Name":"John"});{    "acknowledged" : true, "insertedId" : ObjectId("5e931785fd2d90c177b5bcda") } > db.demo593.insertOne({id:3,"Name":"Bob"});{    "acknowledged" : true, "insertedId" : ObjectId("5e93178cfd2d90c177b5bcdb") } > db.demo593.insertOne({id:4,"Name":"Sam"});{    "acknowledged" : true, "insertedId" : ObjectId("5e931792fd2d90c177b5bcdc") }

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

> db.demo593.find();

This will produce the following output −

{ "_id" : ObjectId("5e93177dfd2d90c177b5bcd9"), "id" : 1, "Name" : "Chris" } { "_id" : ObjectId("5e931785fd2d90c177b5bcda"), "id" : 2, "Name" : "John" } { "_id" : ObjectId("5e93178cfd2d90c177b5bcdb"), "id" : 3, "Name" : "Bob" } { "_id" : ObjectId("5e931792fd2d90c177b5bcdc"), "id" : 4, "Name" : "Sam" }

Following is the query to fetch specific multiple documents −

> db.demo593.find({id:{$in:[1,3]}});

This will produce the following output −

{ "_id" : ObjectId("5e93177dfd2d90c177b5bcd9"), "id" : 1, "Name" : "Chris" } { "_id" : ObjectId("5e93178cfd2d90c177b5bcdb"), "id" : 3, "Name" : "Bob" }