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Python Mongodb – Delete_many()

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  • Last Updated : 11 Jul, 2022
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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: 

python-mongodb-delete-many-1

 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: 

python-mongodb-delet-many-2

 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:

python-mongodb-delete-many-3 


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