Normalization — Why You Don't Store Everything in One Table
Understand database normalization through 1NF, 2NF, and 3NF with practical examples that show why splitting data across tables prevents real problems.
When you first start building apps, it's tempting to put everything in one big table. Customer name, order date, product name, product price, shipping address — all in a single row. It works. The queries are simple. Life is good.
Then you need to update a customer's address, and it's stored in 47 different rows. You update 46 of them. One gets missed. Now your shipping system sends a package to the wrong address.
This is the problem normalization solves.
What Is Normalization?
Normalization is the process of organizing your database tables to reduce redundancy and prevent inconsistencies. Instead of one massive table, you split your data into multiple related tables, each storing one type of thing.
The core idea: every piece of data should live in exactly one place. When you n
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