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Azure Database for PostgreSQL is a PaaS relational database offering based on the PostgreSQL Community Edition. Supported versions of the PostgreSQL database engine include 9.6, 10, and 11 for Single Server as well as 11, 12, and 13 for Flexible Server. Azure Database for PostgreSQL includes the same service tier resource configurations as Azure Database for MySQL for its Single Server and Flexible Server deployment models. It also includes the same configuration options as Azure Database for MySQL when deploying it through the Azure Portal.
Along with the Single Server and Flexible Server deployment models, Azure Database for PostgreSQL also includes a Hyperscale deployment option. Hyperscale (Citus) horizontally scales queries across multiple nodes through data sharding. This deployment option is typically used for multi-tenant applications that require greater scale and performance, such as real-time operational and high throughput transactional workloads. Azure Database for PostgreSQL Hyperscale (Citus) supports versions 11, 12, and 13 of the PostgreSQL database engine.