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Relational vs. NoSQL: Why NoSQL?

Explore the reasons why NoSQL databases became critical for modern applications by overcoming relational database limitations. Understand schema flexibility, horizontal scaling, and the CAP theorem trade-offs. Gain insight into when to choose NoSQL for evolving, large-scale data needs.

When building a social media app, a user profile typically consists of basic information, including name, email, and password.

However, we soon plan to add a bio, a profile picture, a list of friends, posts, comments, and likes. Then, we might add features like stories, saved items, or professional endorsements. With a traditional relational database, every one of these changes would require modifying the table structure for millions of users, a process that is slow and risky.

This is where a different kind of database started to shine, one that could handle rapidly changing data and massive scale with ease. This is the world of NoSQL, and we’re about to explore why it became so important. ...