Database Normalization 1NF, 2NF, 3NF with Examples

Database normalization is the process of organizing data in a database to minimize redundancy, reduce data inconsistencies, and ensure data integrity.
In this tutorial, you will learn about 1NF, 2NF, and 3NF with examples.
1NF (First Normal Form): Explore the requirements and principles of 1NF, the initial step in normalization, with real-world examples to illustrate the concept.
2NF (Second Normal Form): Delve into the complexities of 2NF, understanding how it builds upon 1NF to further eliminate data redundancies and inconsistencies.
3NF (Third Normal Form): Uncover the advanced principles of 3NF, focusing on achieving a higher level of data integrity and a more streamlined database structure.

[@vaibhav89rungta]

This is a helpful video. Commenting coz just a like isn't enough for the detailed examples and the work that went in creating this 🙂 I came across this video in my search results from Perplexity AI. Also appreciate you bringing up the challenges of understanding the difference between 2NF and 3NF and re-doing th example with a different approach. Thank you

[@CloudConceptsByChandra]

Thank you so much for your kind words! 😊

[@tarkanyuksel2384]

Thank you for the clear explanation. I have a question. The "student_course" table has two columns. Both columns are ID columns. When we need to enter new data in that table (when a student is enrolled in a new class), isn't it going to be difficult because IDs won't mean anything to us and we will need to look up the ID of each student and the course the student is enrolling in? If the table is in Excel, we can add more columns and use VLOOK up to call the values from the other table. But is this the right approach I am wondering?

[@CloudConceptsByChandra]

Correct! Populating junction tables can be a pain. This process is typically automated rather than done manually. For example, you might use a stored procedure that takes the necessary details, performs lookups internally, and inserts data into the appropriate tables

[@tarkanyuksel2384]

That makes sense. Thank you.

[@sattirajurnssaisatwik]

Well explained!!

[@hamdhy7_o]

good video, but please keep the video short