What is Azure SQL Database? Azure SQL Database Azure SQL Database is a fully managed platform as a service (PaaS) database engine that handles most of the database management functions such as upgrading, patching, backups, and monitoring without user involvement. Azure SQL Database is always running on the latest stable version of the SQL Server database engine and patched OS with 99.99% availability. PaaS capabilities built into Azure SQL Database enable you to focus on the domain-specific database administration and optimization activities that are critical for your business. With Azure SQL Database , you can create a highly available and high-performance data storage layer for the applications and solutions in Azure. SQL(structured query launguage) database can be the right choice for a variety of modern cloud application because it enables you to process both relational data anf non-relational data.