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Update all Documents in a Collection using PyMongo

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Count the number of Documents in MongoDB using Python

Last Updated :12 Jul, 2022

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MongoDB is a document-oriented NoSQL database that is a non-relational DB. MongoDB is a schema-free database that is based onBinary JSON format. It is organized with a group of documents (rows in RDBMS) called collection (table in RDBMS). The collections in MongoDB are schema-less.PyMongo is one of the MongoDB drivers or client libraries. Using the PyMongo module we can send requests and receive responses from

Count the number of Documents using Python

Method 1: Using count() The total number of documents present in the collection can be retrieved by usingcount() method. Deprecated in version 3.7.

db.collection.count()

Example : Count the number of documents (my_data) in the collection using count().Sample Database: python-mongodb-sample-database4

frompymongoimportMongoClientClient=MongoClient()myclient=MongoClient('localhost',27017)my_database=myclient[&quotGFG&quot]my_collection=my_database[&quotStudent&quot]# number of documents in the collectionmydoc=my_collection.find().count()print(&quotThenumberofdocumentsincollection:&quot,mydoc)

Output :

The number of documents in collection :  8

Method 2: count_documents() Alternatively, you can also use count_documents() function in pymongo to count the number of documents present in the collection.

Syntax :

db.collection.count_documents({query, option})

Example: Retrieves the documents present in the collection and the count of the documents using count_documents().

frompymongoimportMongoClientClient=MongoClient()myclient=MongoClient('localhost',27017)my_database=myclient[&quotGFG&quot]my_collection=my_database[&quotStudent&quot]# number of documents in the collectiontotal_count=my_collection.count_documents({})print(&quotTotalnumberofdocuments:&quot,total_count)

Output:

Total number of documents :  8

Update all Documents in a Collection using PyMongo

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