How to remove document on the basis of _id in MongoDB?

MongoDBDatabaseBig Data Analytics

To remove document on the basis of _id in MongoDB, implement the following syntax

db.yourCollectionName.remove({“_id”:ObjectId(“yourId”});

Let us first implement the following query to create a collection with documents

>db.removeDocumentOnBasisOfId.insertOne({"UserName":"Larry","UserAge":23,"UserCountryName":"US"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c986f9f330fd0aa0d2fe4a3")
}
>db.removeDocumentOnBasisOfId.insertOne({"UserName":"Sam","UserAge":21,"UserCountryName":"UK"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c986fb4330fd0aa0d2fe4a4")
}
>db.removeDocumentOnBasisOfId.insertOne({"UserName":"Chris","UserAge":24,"UserCountryName":"US"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c986fc0330fd0aa0d2fe4a5")
}
>db.removeDocumentOnBasisOfId.insertOne({"UserName":"Robert","UserAge":26,"UserCountryName":"UK"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c986fcf330fd0aa0d2fe4a6")
}
>db.removeDocumentOnBasisOfId.insertOne({"UserName":"David","UserAge":28,"UserCountryName":"AUS"});
{
   "acknowledged" : true,
   "insertedId" : ObjectId("5c986fed330fd0aa0d2fe4a7")
}

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

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

This will produce the following output

{
   "_id" : ObjectId("5c986f9f330fd0aa0d2fe4a3"),
   "UserName" : "Larry",
   "UserAge" : 23,
   "UserCountryName" : "US"
}
{
   "_id" : ObjectId("5c986fb4330fd0aa0d2fe4a4"),
   "UserName" : "Sam",
   "UserAge" : 21,  
   "UserCountryName" : "UK"
}
{
   "_id" : ObjectId("5c986fc0330fd0aa0d2fe4a5"),
   "UserName" : "Chris",
   "UserAge" : 24,
   "UserCountryName" : "US"
}
{
   "_id" : ObjectId("5c986fcf330fd0aa0d2fe4a6"),
   "UserName" : "Robert",
   "UserAge" : 26,
   "UserCountryName" : "UK"
}
{
   "_id" : ObjectId("5c986fed330fd0aa0d2fe4a7"),
   "UserName" : "David",
   "UserAge" : 28,
   "UserCountryName" : "AUS"
}

Following is the query to remove document on the basis of _id

> db.removeDocumentOnBasisOfId.remove({"_id":ObjectId("5c986fc0330fd0aa0d2fe4a5")});
WriteResult({ "nRemoved" : 1 })

We have removed the records of Chris on the basis of its _id above. Now display all documents from the collection to check the document has been removed or not

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

This will produce the following output

{
   "_id" : ObjectId("5c986f9f330fd0aa0d2fe4a3"),
   "UserName" : "Larry",
   "UserAge" : 23,
   "UserCountryName" : "US"
}
{
   "_id" : ObjectId("5c986fb4330fd0aa0d2fe4a4"),
   "UserName" : "Sam",
   "UserAge" : 21,
   "UserCountryName" : "UK"
}
{
   "_id" : ObjectId("5c986fcf330fd0aa0d2fe4a6"),
   "UserName" : "Robert",
   "UserAge" : 26,
   "UserCountryName" : "UK"
}
{
   "_id" : ObjectId("5c986fed330fd0aa0d2fe4a7"),
   "UserName" : "David",
   "UserAge" : 28,
   "UserCountryName" : "AUS"
}
raja
Published on 11-Apr-2019 12:19:21
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