Azure Web apps and Azure SQL databases are primary components in Sitecore environments deployed on Azure PAAS. For example a XP Topology, Sitecore 9.0.2 ARM

Best way to achieve something is to.. Just do it..
Azure Web apps and Azure SQL databases are primary components in Sitecore environments deployed on Azure PAAS. For example a XP Topology, Sitecore 9.0.2 ARM