Basically the difference is: In the first way you are using a API developed for the Flask framework, called Flask-SQLAlchemy. It's the option if you are creating a Flask application, because the scope of the Session can be managed automatically by your application.
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Url:https://stackoverflow.com/questions/14343740/flask-sqlalchemy-or-sqlalchemy
9 hours ago · Flask_SQLAlchemy handles session configuration, setup and teardown for you. Gives you declarative base model that makes querying and pagination easier; Backend specific …
Url:https://www.reddit.com/r/flask/comments/i2vkhy/flask_and_sqlalchemy_vs_flasksqlalchemy/
35 hours ago What is the difference between Flask and SQLAlchemy? Instead, SQLAlchemy, a Python toolkit is a powerful OR Mapper that gives application developers the full power and flexibility of SQL. …
Url:https://docs.sqlalchemy.org/en/13/orm/session_basics.html
15 hours ago I have a flask application which uses SQLAlchemy to talk to the database. For a single request application performs multiple dml operations following transaction as a single unit of work. …
Url:https://medium.com/analytics-vidhya/under-the-hood-of-flask-sqlalchemy-793f7b3f11c3
22 hours ago The Flask-SQLAlchemy project also provides a request-scoped session, along with much more. It comes an API that acts as a facade over various SQL Alchemy APIs (engines, models, …