Python MySQL Where Clause (original) (raw)

Last Updated : 25 Apr, 2025

Where clause is used in MySQL database to filter the data as per the condition required. You can fetch, delete or update a particular set of data in MySQL database by using where clause.
Syntax

SELECT column1, column2, …. columnN FROM [TABLE NAME] WHERE [CONDITION];

The above syntax is used for displaying a certain set of data following the condition.
Example: Consider the following database named college and having a table name as a student.
Schema of the database:

python-db-schema

Database:

python-db-table

Where Clause In Python

Steps to use where clause in Python is:

  1. First form a connection between MySQL and Python program. It is done by importing mysql.connector package and using mysql.connector.connect() method, for passing the user name, password, host (optional default: localhost) and, database (optional) as parameters to it.
  2. Now, create a cursor object on the connection object created above by using cursor() method. A database cursor is a control structure that enables traversal over the records in a database.
  3. Then, execute the where clause statement by passing it through execute() method.

Python3

import mysql.connector

conn = mysql.connector.connect(user = 'your_username' ,

`` host = 'localhost' ,

`` password = 'your_password' ,

`` database = 'College' )

mycursor = conn.cursor();

sql = "select * from Student where Roll_no > = 3 ;"

mycursor.execute(sql)

myresult = mycursor.fetchall()

for x in myresult:

`` print (x)

conn.close()

OUTPUT:

python-where-mysql

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