Can we remove _id from MongoDB query result?

To remove _id from MongoDB result, you need to set 0 for _id field. Following is the syntax

db.yourCollectionName.find({},{_id:0});

To understand it, let us create a collection with documents. Following is the query

> db.removeIdDemo.insertOne({"UserName":"John","UserAge":23});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c9bb4042d66697741252440")
}
> db.removeIdDemo.insertOne({"UserName":"Mike","UserAge":27});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c9bb40c2d66697741252441")
}
> db.removeIdDemo.insertOne({"UserName":"Sam","UserAge":34});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c9bb4162d66697741252442")
}
> db.removeIdDemo.insertOne({"UserName":"Carol","UserAge":29});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c9bb4222d66697741252443")
}

Following is the query to display all documents from a collection with the help of find() method

> db.removeIdDemo.find().pretty();

This will produce the following output

{
   "_id" : ObjectId("5c9bb4042d66697741252440"),
   "UserName" : "John",
   "UserAge" : 23
}
{
   "_id" : ObjectId("5c9bb40c2d66697741252441"),
   "UserName" : "Mike",
   "UserAge" : 27
}
{
   "_id" : ObjectId("5c9bb4162d66697741252442"),
   "UserName" : "Sam",
   "UserAge" : 34
}
{
   "_id" : ObjectId("5c9bb4222d66697741252443"),
   "UserName" : "Carol",
   "UserAge" : 29
}

Following is the query to remove _id from Mongo result

> db.removeIdDemo.find({},{_id:0});

This will produce the following output

{ "UserName" : "John", "UserAge" : 23 }
{ "UserName" : "Mike", "UserAge" : 27 }
{ "UserName" : "Sam", "UserAge" : 34 }
{ "UserName" : "Carol", "UserAge" : 29 }