MongoDB - Delete Document
In this chapter, we will learn how to delete a document using MongoDB.
The remove() Method
MongoDB's remove() method is used to remove a document from the collection. remove() method accepts two parameters. One is deletion criteria and second is justOne flag.
deletion criteria − (Optional) deletion criteria according to documents will be removed.
justOne − (Optional) if set to true or 1, then remove only 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(5983548781331adf45ec5), "title":"MongoDB Overview"} { "_id" : ObjectId(5983548781331adf45ec6), "title":"NoSQL Overview"} { "_id" : ObjectId(5983548781331adf45ec7), "title":"Tutorials Point Overview"}
Following example will remove all the documents whose title is 'MongoDB Overview'.
>db.mycol.remove({'title':'MongoDB Overview'}) >db.mycol.find() { "_id" : ObjectId(5983548781331adf45ec6), "title":"NoSQL Overview"} { "_id" : ObjectId(5983548781331adf45ec7), "title":"Tutorials Point Overview"} >
Remove Only One
If there are multiple records and you want to delete only the first record, then set justOne parameter in remove() method.
>db.COLLECTION_NAME.remove(DELETION_CRITERIA,1)
Remove All Documents
If you don't specify deletion criteria, then MongoDB will delete whole documents from the collection. This is equivalent of SQL's truncate command.
>db.mycol.remove() >db.mycol.find() >