Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to delete element from an array in MongoDB?
To delete element from an array, use $pull. Let us create a collection with documents −
> db.demo279.insertOne({id:[101,103,105,110]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e490af7dd099650a5401a58")
}
> db.demo279.insertOne({id:[107,111,110]});
{
"acknowledged" : true,
"insertedId" : ObjectId("5e490b06dd099650a5401a59")
}Display all documents from a collection with the help of find() method −
> db.demo279.find();
This will produce the following output −
{ "_id" : ObjectId("5e490af7dd099650a5401a58"), "id" : [ 101, 103, 105, 110 ] }
{ "_id" : ObjectId("5e490b06dd099650a5401a59"), "id" : [ 107, 111, 110 ] }Following is the query to delete element from an array &minus';
> db.demo279.update({},{$pull:{id:110}},{multi:true});
WriteResult({ "nMatched" : 2, "nUpserted" : 0, "nModified" : 2 })Display all documents from a collection with the help of find() method −
> db.demo279.find();
This will produce the following output −
{ "_id" : ObjectId("5e490af7dd099650a5401a58"), "id" : [ 101, 103, 105 ] }
{ "_id" : ObjectId("5e490b06dd099650a5401a59"), "id" : [ 107, 111 ] }
Updated on: 31-Mar-2020
209 Views
Advertisements