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Python Mongodb - Delete_one()

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MongoDB python | Delete Data and Drop Collection

Last Updated :04 Jul, 2025

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InMongoDB, deletion is key to efficient data management. PyMongo offers methods to delete a single document, multiple documents, all documents in a collection or the entire collection itself. Here's a quick overview of these techniques:

1. Delete a single document: Use delete_one() to remove only the first document that matches the filter.

res = my_collection.delete_one({"name": "Mr.Geek"})

To see the number of documents deleted :

print(res.deleted_count)

2. Delete Multiple Documents:Use delete_many() to remove all documents that match a specific condition.

res = my_collection.delete_many({"name": "Mr.Geek"})

To see the number of documents deleted :

print(res.deleted_count)

3. Delete All Documents in a Collection: Using delete_many({}): This deletes all documents in the collection but keeps the collection and its indexes.

res = my_collection.delete_many({})

To see the number of documents deleted :

print(res.deleted_count)

4. Drop the entire collection: If you want to remove all documents along with the collection and its indexes, use drop().

db.my_collection.drop()

Examples

Example 1: Delete a single document

frompymongoimportMongoClientc=MongoClient("mongodb://localhost:27017/")db=c["my_database"]col=db["my_collection"]col.insert_many([{"name":"Mr.Geek","role":"Developer"},{"name":"Mr.Geek","role":"Designer"}])res=col.delete_one({"name":"Mr.Geek"})print(res.deleted_count)

Output

1

Explanation:

delete_one()deletes only the first document that matches thefilter { "name": "Mr.Geek" }. Even if multiple documents match, only one is removed.
deleted_count shows how many documents were deleted (expected: 1).

Example 2: Delete multiple documents

frompymongoimportMongoClientc=MongoClient("mongodb://localhost:27017/")db=c["my_database"]col=db["my_collection"]col.insert_many([{"name":"Mr.Geek","role":"Developer"},{"name":"Mr.Geek","role":"Tester"},{"name":"Mr.Geek","role":"Manager"}])res=col.delete_many({"name":"Mr.Geek"})print(res.deleted_count)

Output

4

Explanation:

delete_many() deletes all documents matching the filter { "name": "Mr.Geek" }.
deleted_count shows how many documents were deleted.

Example 3: Delete all documents in a collection

frompymongoimportMongoClientc=MongoClient("mongodb://localhost:27017/")db=c["my_database"]col=db["my_collection"]col.insert_many([{"product":"Laptop"},{"product":"Phone"},{"product":"Tablet"}])res=col.delete_many({})print(res.deleted_count)

Output

3

Explanation:

Passing an emptyfilter {} to delete_many() means “match all documents”. This will remove every document in the collection.
deleted_count will show the total deleted (expected: 3).

Example 4: Drop the entire collection

frompymongoimportMongoClientc=MongoClient("mongodb://localhost:27017/")db=c["my_database"]col=db["my_collection"]col.insert_many([{"product":"Laptop"},{"product":"Phone"},{"product":"Tablet"}])db.my_collection.drop()print("Collection dropped successfully.")

Output

Collection dropped successfully.

Explanation:

.drop()deletes the entire collection, including all documents and indexes.
db.my_collection.drop()and col.drop() are functionally identical.

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Python Mongodb - Delete_one()

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