2. Scalability

Evaluating your application’s scalability needs, both in terms of data volume and read/write load, is crucial in choosing the right database.

SQL databases: SQL databases are known for their vertical scalability, which means adding more resources (CPU, RAM, storage) to a single server to handle increased workload. This can be suitable for applications with moderate scaling requirements, such as small to medium-sized web applications or internal company tools. However, this approach can be expensive and has limitations as the server's capacity is finite.

NoSQL databases: NoSQL databases provide horizontal scalability, allowing you to distribute data across multiple servers, making it easier to handle large volumes of data or high traffic loads. This is advantageous for large-scale applications with high throughput and data volume requirements, such as big data analytics, real-time data processing, or Internet of Things (IoT) applications. If your application requires easy scaling to accommodate growing data or user bases, NoSQL databases are a better choice.

In above paragraph why its written that SQL db is only vertically scalable? Can't we add more servers and scale horizontally? And there is a db called amazon aurora rds which scales automatically. So I think this paragraph needs improvement sir. Please check and resolve.