Azure SQL Database – Version and Compatibility Level

In the on-premises world, when we install a SQL Server on our own servers, we decide on SQL Version (2012, 2014….), Edition (Standard, Enterprise, Epress…) and we set the database Compatibility Levels according to our applications’ specs. But what is it like with the Azure SQL Database (PaaS)? The answer is – it’s very different so let’s go through the key points to have in mind:
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SQL Server in Azure

There are two flavors of SQL Server in Azure: one is the traditional SQL Server platform hosted in Azure virtual machines, also described as Infrastructure as a Service (IaaS). The other is called Azure SQL Database, database-as-a-service or Platform as a Service (PaaS).  there are several important differences in functionality and features, so let’s look at them:

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