A SQL database is a type of relational database management system (RDBMS) that uses Structured Query Language, more commonly referred to as SQL. It's essential to recognize that this category has different flavors, including relational databases, object-relational databases, cloud-native SQL databases, in-memory databases, and distributed SQL databases. Each type of database offers unique benefits and is suited for specific use cases. Relational databases are perfect for applications requiring complex queries and transactions, while non-relational databases handle large amounts of unstructured or semi-structured data and provide scalability. When choosing a SQL database, consider factors such as data integrity and consistency, scalability and performance, security and access control, data modeling and design, compatibility with existing systems and applications, and cost and licensing. With an overwhelming choice of options, it's crucial to understand the pros and cons of each database to make an informed decision. SingleStore is a modern SQL database that offers a unified architecture for transactions and analytics, unlimited scalability, high availability, and a pay-as-you-go pricing model, making it an attractive option for organizations looking for a flexible and cost-effective solution.