Activity 10o (Normalization) | 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 tackle our final activity on Database Normalization. We take an unnormalized database (0NF) containing customer and company contact details and walk step-by-step through the process of converting it into First (1NF), Second (2NF), and Third Normal Form (3NF). Beyond the practical steps, we also cover a highly testable topic for your exams: the theoretical advantages and disadvantages of normalizing databases in real-world company scenarios. 📌 What you'll learn in this tutorial: - How to identify unnormalized data (0NF), including non-atomic fields and duplications. - First Normal Form (1NF): Splitting non-atomic data (like names and addresses) and assigning Primary Keys. - Second Normal Form (2NF): Breaking data down into separate, linked tables (Customer Table and Company Table). - Third Normal Form (3NF): Evaluating your tables to ensure no further breakdown is required. - Theory: The Advantages (e.g., reduced storage, improved referential integrity) and Disadvantages (e.g., increased complexity, processing power demands) of database normalization. ⏱️ Chapter Timestamps: 00:00 - Introduction to the Unnormalized Database (0NF) 02:16 - Converting to First Normal Form (1NF) 02:53 - Breaking Down Tables for Second Normal Form (2NF) 03:26 - Evaluating for Third Normal Form (3NF) 03:59 - The Advantages of Database Normalization 05:22 - The Disadvantages of Database Normalization 06:33 - 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 1NF, 2NF, or 3NF.