Connecting-POSTGRES-SQL--from-python

Connect PostgreSQL database from Python, using the psycopg2 or SQLAlchemy library. The most common and reliable library for interacting with PostgreSQL databases and Python

Explanation:

create_engine(): Establishes a connection to the PostgreSQL database using the connection string.
Connection string format: "postgresql+psycopg2://user:password@host:port/database"
connection.execute(): Executes an SQL query.
result.fetchall(): Fetches all rows from the query result.
pandas.DataFrame(): Converts the result into a DataFrame for easier viewing and manipulation (optional).