Task 10ae (Normalisation) | Chapter 10 Database | Cambridge AS IT 9626

Hi👋🏻, اهلاً وسهلاً 🔻To download the resources from: https://www.hachettelearning.com/answers-and-extras/cambridge-international-as-level-information-technology-student-s-book-answers ------------------------ In this video, we dive deep into the theory and practice of Database Normalization. We explore why normalization is necessary to reduce data redundancy and improve database efficiency. Walking through two complete, real-world examples (a School Course database and a Concert Booking database), we break down the exact steps to convert a flat file all the way to the Third Normal Form. By the end of this video, you will be able to confidently identify unnormalized data and logically divide it into strong, relational tables—a crucial skill for your AS IT exams! 📌 What you'll learn in this tutorial: - Identifying 0NF (Unnormalized Form): Spotting flat files, duplicated records, and non-atomic data. - Converting to 1NF (First Normal Form): Separating non-atomic data (like full names or combined addresses) and adding Primary Keys. - Converting to 2NF (Second Normal Form): Breaking data into smaller, dedicated tables and creating link tables. - Converting to 3NF (Third Normal Form): Further dividing tables to ensure every non-key attribute is strictly dependent on the primary key (e.g., separating Teacher details from Course details, or Agent details from Artist details). - Two complete walkthrough examples to solidify your understanding. ⏱️ Chapter Timestamps: 00:00 - Introduction: What is Database Normalization? 01:10 - Example 1: Identifying Zero Normal Form (0NF) 02:47 - Example 1: Converting to First Normal Form (1NF) 05:34 - Example 1: Creating Tables for Second Normal Form (2NF) 07:05 - Example 1: Finalizing Third Normal Form (3NF) 09:47 - Example 2 (Concert Database): Identifying 0NF 11:00 - Example 2: Converting to 1NF 11:34 - Example 2: Converting to 2NF 12:21 - Example 2: Converting to 3NF & Wrap Up If you found this tutorial helpful, please leave a like and subscribe for more Cambridge AS IT 9626 walkthroughs! Let me know in the comments if you have any questions about identifying non-atomic data or creating link tables.