Python Mongodb – Delete_many()

MongoDB is a general-purpose, document-based, distributed database built for modern application developers and the cloud. It is a document database, which means it stores data in JSON-like documents. This is an efficient way to think about data and is more expressive and powerful than the traditional table model.

Delete_many()

Delete_many() is used when one needs to delete more than one document. A query object containing which document to be deleted is created and is passed as the first parameter to the delete_many().

Syntax:

collection.delete_many(filter, collation=None, hint=None, session=None)

Parameters:

• ‘filter’ : A query that matches the document to delete.
• ‘collation’ (optional) : An instance of class: ‘~pymongo.collation.Collation’. This option is only supported on MongoDB 3.4 and above.
• ‘hint’ (optional) : An index to use to support the query predicate. This option is only supported on MongoDB 3.11 and above.
• ‘session’ (optional) : a class:’~pymongo.client_session.ClientSession’.

Sample Database:

Example 1: Deleting all the documents where the name starts with ‘A’. 

Python3

import pymongo


client = pymongo.MongoClient("mongodb://localhost:27017/")

# Connecting to the database
mydb = client["GFG"]

# Connecting the to collection
col = mydb["Geeks"]

query = {"Name": {"$regex": "^A"}}
d = col.delete_many(query)

print(d.deleted_count, " documents deleted !!")

Output:

2  documents deleted !!

MongoDB Shell:

Example 2:

Python3

import pymongo


client = pymongo.MongoClient("mongodb://localhost:27017/")

# Connecting to the database
mydb = client["GFG"]

# Connecting the to collection
col = mydb["Geeks"]

query = {"Class": '3'}
d = col.delete_many(query)

print(d.deleted_count, " documents deleted !!")

Output:

1  documents deleted !!

MongoDB Shell: