When to Use NoSQL

Summary

Recognizing the signals that point toward a NoSQL database — flexible/evolving schemas, massive horizontal scale needs, or naturally hierarchical data — versus when SQL is still the better default.

• 1List the specific requirements of a project you know and decide SQL vs NoSQL for it.
• 2Learn that 'NoSQL is more scalable' is often oversimplified — SQL databases scale very far too.
• 3Recognize that many production systems use SQL as the source of truth and NoSQL/Redis for specific hot paths.