Python Connection with PostgreSQL

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

import psycopg2

conn = psycopg2.connect(database ="Shauryadb", user = "shaurya-user", password = "passsha", 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.f

cur = conn.cursor()

 
Step #3: Write your SQL Query and execute it.

query = """select name, email from eazy_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

conn.close() print('Connection closed')

 

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