postgre sql connection to python code example
Example 1: how to connect postgres database to python
import psycopg2
try:
connection = psycopg2.connect(user = "sysadmin",
password = "pynative@#29",
host = "127.0.0.1",
port = "5432",
database = "postgres_db")
cursor = connection.cursor()
# Print PostgreSQL Connection properties
print ( connection.get_dsn_parameters(),"\n")
# Print PostgreSQL version
cursor.execute("SELECT version();")
record = cursor.fetchone()
print("You are connected to - ", record,"\n")
except (Exception, psycopg2.Error) as error :
print ("Error while connecting to PostgreSQL", error)
finally:
#closing database connection.
if(connection):
cursor.close()
connection.close()
print("PostgreSQL connection is closed")
Example 2: how to connect postgres database to python
import psycopg2
from psycopg2 import Error
try:
connection = psycopg2.connect(user = "postgres",
password = "pass@#29",
host = "127.0.0.1",
port = "5432",
database = "postgres_db")
cursor = connection.cursor()
create_table_query = '''CREATE TABLE mobile
(ID INT PRIMARY KEY NOT NULL,
MODEL TEXT NOT NULL,
PRICE REAL); '''
cursor.execute(create_table_query)
connection.commit()
print("Table created successfully in PostgreSQL ")
except (Exception, psycopg2.DatabaseError) as error :
print ("Error while creating PostgreSQL table", error)
finally:
#closing database connection.
if(connection):
cursor.close()
connection.close()
print("PostgreSQL connection is closed")