Azure Database for PostgreSQL support for PostgreSQL 11 is now in preview
Updated: 12 June, 2019
Azure Database for PostgreSQL now provides preview support for the latest major version of PostgreSQL, version 11. Major enhancements in PostgreSQL 11 include a variety of improvements associated with partitioning, parallelism, stored procedures, Windows function support, and covering indexes, as well as several other performance enhancements.
See the PostgreSQL 11 release notes for additional information about the newest functionality and how this version differs from PostgreSQL 10.