SQL Server in VM and Azure SQL Database are just a fraction of the Azure data platform offering.
When we talk about RDBMS in IaaS, we really don't have any restrictions. We can create any type of VM with a number of different operating systems and install anything we want, such as Oracle, MySQL, PostgreSQL, and so on. There are also a number of images that include this software pre-installed. The same thing goes for NoSQL databases: we can install anything on our VM, or we can even choose an image that includes MongoDB, CouchDB, and many others.
When talking about RDBMS in the PaaS model, we have also different options such as MySQL, PostgreSQL, SQL data warehouses, and others. Running NoSQL as PaaS also offers different options, including Azure Cosmos DB or MongoDB.
Azure data platform is extended with analytic services in Azure that also have...