Bulk update of rows in Postgres DB using psycopg2

Update multiple rows in same query in PostgreSQL using Pyscopg2-Python

Last Updated : 17 Oct, 2021

In this article, we are going to update multiple rows in the same query in PostgreSQL using Pyscopg2in Python.

We can update multiple values at once by using the update clause from PostgreSQL. First, we import the psycopg2 package and establish a connection to a PostgreSQL database using the pyscopg2.connect() method.

Syntax of update clause:

UPDATE "table"
SET "column_one" = value1, 
"column_two" = value2, 
"column_three" = valueN
WHERE condition;

Database Used

Below is the implementation:

Python3

import psycopg2

conn = psycopg2.connect(
    database="classroom_database",
      user='postgres', password='pass',
    host='127.0.0.1', port='5432'
)

conn.autocommit = True
cursor = conn.cursor()


sql = ''' update  student_details  set
          cgpa = 9.5 ,
          branch = 'AE'
        where student_name = 'rahul';'''

cursor.execute(sql)

sql1 = '''select * from student_details;'''
cursor.execute(sql1)

for i in cursor.fetchall():
    print(i)

conn.commit()
conn.close()

Output:

(12124468, 'arjun', 9.7, '[email protected]', 'CSE')
(12124469, 'DIYA', 9.4, '[email protected]', 'CSE')
(12124466, 'sarah', 9.8, '[email protected]', 'CSE')
(12124470, 'priya', 8.8, '[email protected]', 'CSE')
(12124467, 'rahul', 9.5, '[email protected]', 'AE')

Output in PostgreSQL:

Bulk update of rows in Postgres DB using psycopg2

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