Delete Document in Mongodb: A Practical Guide

Remove () method in MongoDB

The remove () method in MongoDB helps delete the Document from Collection. The remove () method takes two parameters. The first parameter of the deletion criteria determines the Document to delete, and the second parameter is justOne.

1. deletion criteria : (Optional) Specify the Document to delete.
2. justOne : (Optional) If set to true or 1, only delete a Document.

Syntax

The basic syntax of remove () method is as follows:

 > db . COLLECTION_NAME . remove ( DELLETION_CRITTERIA ) 

For instance,

You monitor the Collection named mycol with the following data:

 { "_id" : ObjectId ( 5983548781331adf45ec5 ), "title" : "MongoDB Overview" } { "_id" : ObjectId ( 5983548781331adf45ec6 ), "title" : "NoSQL Overview" } { "_id" : ObjectId ( 5983548781331adf45ec7 ), "title" : "Tutorials Point Overview" } 

the example below will delete all 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" } > 

Only delete a Document in MongoDB

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

 > db . COLLECTION_NAME . remove ( DELETION_CRITERIA , 1 ) 

Delete all Documents in MongoDB