The answer
You can migrate later, but it is costly. Analyze carefully upfront, but do not overthink it. Most databases handle most apps. Start with what fits your data and queries, and adapt as the app grows and your needs clarify.
A Roadmap to Choosing SQL vs NoSQL for Your Node.js Project
What if I choose the wrong database?
More FAQs in A Roadmap to Choosing SQL vs NoSQL for Your Node.js Project
Analyze data shape (relational vs document), query patterns (joins vs lookups), scalability needs, team skills, and ecosystem fit. Start with the database that fits immediate needs.
Start with one database that fits your immediate needs. Most apps stay on one database. You can add specialized databases (Redis for caching, Elasticsearch for search) for specific features as your app grows and needs them.
Yes, significantly. A database your team knows beats one they do not. The learning curve affects development speed, and a team proficient in one database will build faster than one learning a new one.
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