MongoDB Delete Document

How to Delete Document(Data) using MongoDB

The remove() Method

To remove a document from the collection, MongoDB's remove() method is used. Two parameters are recognized by the remove() method. One is the criteria for deletion and the second is the flag JustOne.

• Deletion criteria (Optional) The deletion criteria will be removed according to the documents.
• If set to true or 1, justOne-(Optional), then remove just one document.

Syntax

Basic syntax of remove() method is as follows −

>db.COLLECTION_NAME.remove(DELLETION_CRITTERIA)

Example

Consider the mycol collection has the following data.

{_id : ObjectId("507f191e810c19729de860e1"), title: "MongoDB Overview"},
{_id : ObjectId("507f191e810c19729de860e2"), title: "NoSQL Overview"},
{_id : ObjectId("507f191e810c19729de860e3"), title: "phptpoint Ove

The example below remove all documents with the title 'MongoDB Overview'.

>db.mycol.remove({'title':'MongoDB Overview'})
WriteResult({"nRemoved" : 1})
> db.mycol.find()
{"_id" : ObjectId("507f191e810c19729de860e2"), "title" : "NoSQL Overview" }
{"_id" : ObjectId("507f191e810c19729de860e3"), "title" : "phptpoint Overview" }

Remove Only One

If multiple records exist and you want to delete only the first record, set the parameter to justOne in the remove() method.

>db.COLLECTION_NAME.remove(DELETION_CRITERIA,1)

Remove All Documents

If you do not define the deletion criteria, then MongoDB delete the whole set of documents. This is similar to the Truncate command from SQL.

> db.mycol.remove({})
WriteResult({ "nRemoved" : 2 })
> db.mycol.find()
>