Python · Theory

MongoDB in Python

Theory

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MongoDB in Python

MongoDB stores documents, not rigid SQL tables. Python talks to it with PyMongo. A document looks like a dict: {"name": "Asha", "marks": 90}. Collection is the table idea. insert_one, find, update_one, delete_one are the CRUD verbs. Good when shapes vary — one student has email, another doesn’t.

Document vs row: dict vs fixed columns. Don’t pretend Mongo is MySQL with different spelling. Say when you’d pick it — flexible records — and when SQL joins matter more.

MongoDB in Python — output — Asha 90. A Mongo document is a dict. insert_one sends that dict.

Exam tip

Document vs relational row.

Example

# MongoDB in Python
doc = {"name": "Asha", "marks": 90}
print(doc["name"], doc["marks"])
# pymongo: db.students.insert_one(doc)

MongoDB in Python — output: Asha 90. A Mongo document is a dict. insert_one sends that dict.

Short notes

DefDocument DB. PyMongo.
Ruledict-like documents.
RememberCRUD on collections.

Python · Theory

MongoDB in Python

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Theory

120/268

MongoDB in Python

Document vs row: dict vs fixed columns. Don’t pretend Mongo is MySQL with different spelling. Say when you’d pick it — flexible records — and when SQL joins matter more.

MongoDB in Python — output — Asha 90. A Mongo document is a dict. insert_one sends that dict.

Exam tip

Document vs relational row.

Example

# MongoDB in Python
doc = {"name": "Asha", "marks": 90}
print(doc["name"], doc["marks"])
# pymongo: db.students.insert_one(doc)

MongoDB in Python — output: Asha 90. A Mongo document is a dict. insert_one sends that dict.

Short notes

DefDocument DB. PyMongo.
Ruledict-like documents.
RememberCRUD on collections.

MongoDB in Python

Example

Short notes

Questions

MongoDB in Python

Example

Short notes

Questions