Python | Getting started with psycopg2-PostGreSQL Last Updated : 20 Feb, 2019 Comments Improve Suggest changes Like Article Like Report PostgreSQL is a powerful, open source object-relational database system. PostgreSQL runs on all major operating systems. PostgreSQL follows ACID property of DataBase system and has the support of triggers, updatable views and materialized views, foreign keys. To connect PostgreSQL we use psycopg2 . It is the best and most friendly Database adapter in python language. It is both Unicode and Python3 friendly. Installation Required - pip install psycopg2 Let's get started and understand PostgreSQL connection in parts. Step #1: Connection to PostGreSQL Python3 1== import psycopg2 conn = psycopg2.connect(database ="gfgdb", user = "gfguser", password = "passgeeks", host = "52.33.0.1", port = "5432") print("Connection Successful to PostgreSQL") Step #2: Declare Cursor Allows Python code to execute PostgreSQL command in a database session. Python3 1== cur = conn.cursor() Step #3: Write your SQL Query and execute it. Python3 1== query = """select name, email from geeks_members;""" cur.execute(query) rows = cur.fetchall() # Now 'rows' has all data for x in rows: print(x[0], x[1]) Step #4: Close the connection Python3 1== conn.close() print('Connection closed') Comment More infoAdvertise with us Next Article Python | Getting started with psycopg2-PostGreSQL shaurya uppal Follow Improve Article Tags : Technical Scripter Python python-modules Practice Tags : python Similar Reads Do loop in Postgresql Using Psycopg2 Python In this article, we use psycopg2 to loop through all data points using psycopg2 function in Python. We will first connect our PostgreSQL database using psycopg2.connect method, and pass the connection parameters such as the host, database, user, and password. 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