Programming Essentials Python - CRUD Operations - Recap - CRUD Operations

Description Paragraph:

This article provides a comprehensive guide on mastering Python database CRUD (Create, Read, Update, Delete) operations. It covers key concepts, step-by-step instructions, hands-on tasks, and a video tutorial to complement the text. Readers will learn how to establish connections with a database, perform CRUD operations, handle transactions, and more.

Explanation for the video:

The video tutorial accompanying this article demonstrates the practical implementation of Python database CRUD operations. It visually walks through the concepts discussed in the text, making it easier for beginners to understand and follow along.

Put a place holder for the video here with text so that I can replace as part of the automation

Key Concepts Explanation

Establishing Database Connection

To establish a connection to the database, create a connection object using the connection credentials. Here’s an example using SQLite:

import sqlite3

# Create a connection object
connection = sqlite3.connect('database.db')

Performing CRUD Operations

Performing CRUD operations involves executing SQL statements such as INSERT, UPDATE, DELETE, and SELECT. Below is an example of performing an INSERT operation:

# Create a cursor object using the connection
cursor = connection.cursor()

# Execute an INSERT statement
cursor.execute("INSERT INTO table_name (column1, column2) VALUES (value1, value2)")

# Commit the transaction
connection.commit()

# Close the cursor and connection
cursor.close()
connection.close()

Hands-On Tasks

Here are some hands-on tasks for you to practice Python database CRUD operations:

  1. Create a new record in a table using an INSERT statement.
  2. Update an existing record in a table using an UPDATE statement.

Conclusion

In conclusion, mastering Python database CRUD operations is essential for any developer working with databases. By following the key concepts and step-by-step instructions provided in this article, readers can enhance their skills and confidently interact with databases using Python.

Recap - CRUD Operations

Let us recap the process of performing CRUD operations:

  • Establish connection to the database - Create Connection Object
  • Create Cursor Object using Connection Object - connection.cursor.
  • Build Statement to perform one or more INSERT, UPDATE or DELETE.
  • When we perform DML operations as part of transactions such as INSERT, UPDATE or DELETE make sure transactions without exceptions are committed and transactions with exceptions are rolled back.
  • Make sure cursors as well as connections are closed
  • If the database operation involves select only, then we don’t need to commit or rollback. SELECT only reads the data, it will not make any changes to the data in the database.

Watch the video tutorial here