Python MariaDB - Where Clause using PyMySQL

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

Syntax :

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

The above syntax is used for displaying a certain set of data following the condition.

Example 1: Consider the following database named GFG and having a table name as a PRODUCT.

Schema of the Table:

Table data :

Where Clause In Python :

Steps to use where clause in Python is:

1. First form a connection between MariaDB and Python program. It is done by importing pymysql package and using pymysql.connect() method, for passing the username, 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 the 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 the execute() method.

import pymysql

# Create a connection object
# IP address of the MySQL database server
Host = "localhost"  

# User name of the database server
User = "user"       

# Password for the database user
Password = ""           

database = "GFG"

conn  = pymysql.connect(host=Host, user=User, password=Password, database)

# Create a cursor object
cur  = conn.cursor()


query = f"SELECT price,PRODUCT_TYPE FROM PRODUCT WHERE price > 10000"

cur.execute(query)

rows = cur.fetchall()
for row in rows :
    print(row)

conn.close()

Output :

Example 2 :

import pymysql

# Create a connection object

conn  = pymysql.connect('localhost', 'user', 'password', 'database')

# Create a cursor object
cur  = conn.cursor()


query = f"SELECT * FROM PRODUCT WHERE PRODUCT_TYPE in ('Voice','DLC','CALL')"

cur.execute(query)

rows = cur.fetchall()
for row in rows :
    print(row)

conn.close()

Output :