How to connect python to MySQL database.

To connect Python to a MySQL database, you can use the mysql-connector library, which provides an easy way to interact with MySQL databases using Python. Here’s a step-by-step guide on how to do this:

Install mysql-connector:

If you haven’t already, install the mysql-connector library using pip, the Python package manager:

pip install mysql-connector-python

Import the library:

Import the necessary module from the mysql.connector package:

import mysql.connector

Establish a connection:

Use the mysql.connector.connect() function to establish a connection to your MySQL database. You’ll need to provide the database host, username, password, and database name:

Replace these with your actual database credentials

host = "localhost"
user = "your_username"

password = "your_password"

database = "your_database_name"

#Establish the connection

connection = mysql.connector.connect(

host=host,

user=user,

password=password,

database=database

)

Create a cursor:

After establishing the connection, create a cursor object to interact with the database:

cursor = connection. Cursor()

Execute SQL queries:

Now you can execute SQL queries using the cursor. For example, to fetch data:

query = "SELECT * FROM your_table"

cursor. Execute(query)

Fetch all rows

rows = cursor.fetchall()
for row in rows:

print(row)

Commit and close:

After executing your queries, make sure to commit the changes if you’ve made any modifications to the database and then close the cursor and the connection:

 connection. Commit()

cursor. Close()

connection. Close()

Putting it all together, here’s a basic example of connecting to a MySQL database, executing a query, and closing the connection:

import mysql.connector
host = "localhost"

user = "your_username"

password = "your_password"

database = "your_database_name"

connection = mysql.connector.connect(

host=host,

user=user,

password=password,

database=database

)

cursor = connection. Cursor()

query = "SELECT * FROM your_table"

cursor. Execute(query)

rows = cursor.fetchall()

for row in rows:

print(row)

connection. Commit()

cursor. Close()

connection. Close()

Remember to replace the placeholders (your_username, your_password, your_database_name, your_table) with your actual database credentials and table name.