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 }