How can I use “order_by” of Sqlalchemy to retrieve data in descending and ascending order?

 In the context of SQL the “SQLAlchemy order by” is used to retrieve the database ( customers orders derails in your scenario) into ascending and descending order. Here is the example given of how you can fetch the details of the orders of customers in ascending and descending order based on their timestamps:-

From sqlalchemy import create_engine, Column, Integer, String

From sqlalchemy.ext.declarative import declarative_base

From sqlalchemy.orm import session maker

# Create a connection to the database

Engine = create_engine(‘sqlite:///your_database.db’, echo=True) # Replace with your actual database URL

Base = declarative_base()

# Define the Order model

Class Order(Base):

    __tablename__ = ‘orders’

    Id = Column(Integer, primary_key=True)

    Customer_name = Column(String)

    Order_amount = Column(Integer)

# Create the table if it doesn’t exist

Base.metadata.create_all(engine)

# Create a session

Session = sessionmaker(bind=engine)

Session = Session()

# Retrieve data in ascending order of order_amount

Ascending_results = session.query(Order).order_by(Order.order_amount.asc()).all()

Print(“Ascending order:”)

For order in ascending_results:

    Print(f”Customer: {order.customer_name}, Order Amount: {order.order_amount}”)

# Retrieve data in descending order of order_amount

Descending_results = session.query(Order).order_by(Order.order_amount.desc()).all()

Print(“

Descending order:”)

For order in descending_results:

    Print(f”Customer: {order.customer_name}, Order Amount: {order.order_amount}”)

# Close the session

Session.close()

In this above example the “order.timestamp.asc() and “order.timestamp.desc()” sorts your order details of customers into ascending and descending order respectively.

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