PostgreSQL is the most advanced open source database system and it’s used by a number of organisations to run mission-critical workloads – including Microsoft’s Azure cloud service.
However, the Azure Database for PostgreSQL is a slightly different story.
Known as a managed implementation of a service running on Azure cloud infrastructure, Azure Database for PostgreSQL allows customers to quickly develop applications using PostgreSQL, as well as the native tools, drivers, and libraries which are attached to it, without the need to take control of the instances.
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Reference: https://www.itpro.co.uk/databases/34533/what-is-azure-database-for-postgresql
