How do I perform database queries in Flask?

How do I perform database queries in Flask?

In Flask, you can use SQLAlchemy to perform database queries. Do you have a specific query in mind?

I want to retrieve all users from the database.

You can use the following code: users = User.query.all() to get all users. Make sure you have defined your User model.

What if I want to filter users by their age?

You can filter users by age using: users = User.query.filter_by(age=25).all() to get users who are 25 years old.

How can I handle errors during database queries?

You can use try-except blocks to handle errors. For example:

try:
    users = User.query.all()
except Exception as e:
    print(f'Error: {e}')