What is scalability of SQL?

Scalability of SQL refers to the ability of a SQL database to handle increasing amounts of data and user load without compromising performance. This can be achieved through vertical scaling (adding more resources to a single server) or horizontal scaling (distributing the database load across multiple servers). While SQL databases traditionally Excel at vertical scaling, they can also be optimized for horizontal scaling through techniques like sharding and replication. However, scalability can be limited by factors such as schema rigidity and ACID compliance requirements.