Working with Databases in Python: Connecting to SQL Server, MySQL, and PostgreSQL

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Working with Databases in Python: Connecting to SQL Server, MySQL, and PostgreSQL



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Databases are a core part of modern software development, storing and managing data efficiently. Python makes interacting with databases straightforward, allowing developers to retrieve, manipulate, and store data programmatically. Learning how to work with databases is essential for building real-world applications, making it a key topic in any python course.

Python supports many relational databases, including Microsoft SQL Server, MySQL, and PostgreSQL, using dedicated libraries.

 To connect to MS SQL Server, you can use the pyodbc module.
By providing the server name, database, username, and password, Python can execute SQL queries directly on the server:

import pyodbc

conn = pyodbc.connect('DRIVER={SQL Server};SERVER=server_name;DATABASE=db_name;UID=user;PWD=password')

cursor = conn.cursor()

For MySQL, the mysql-connector-python library is commonly used.
It allows Python to connect to MySQL databases with a similar approach:

import mysql.connector

conn = mysql.connector.connect(host='localhost', database='db_name', user='user', password='password')

cursor = conn.cursor()

PostgreSQL can be accessed using the psycopg2 module.

Once connected, you can execute queries, fetch results, and manage transactions:

import psycopg2

conn = psycopg2.connect(host='localhost', dbname='db_name', user='user', password='password')

cursor = conn.cursor()

Do the PCWorkshops Python Course

Using databases in Python provides flexibility, automation, and scalability. With the ability to connect to different database engines, Python programs can interact with enterprise-level systems, web applications, and data pipelines efficiently.

Do the PCWorkshops Python Course

Summary

Working with databases in Python allows developers to build powerful, data-driven applications. For learners seeking hands-on experience with SQL Server, MySQL, PostgreSQL, and other databases, PCWorkshops offers Python courses online and in our London classroom, providing expert-led guidance to master database programming in Python.

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