An Azure relational database service.
Both questions are seperate and are right in the respective contents. In Q2 the ask is which database in PaaS is more in parity with MSFT IAAS SQL server which includes features like linked servers or sql agents Or database and azure sql managed instance provides the same. Whereas for Q1, Azure SQL database is the ans as the ask is which database doesn't need any license and works seperately as seperate engines. So can you plz clarify what exactly is your confusion regarding?