SQL Server 2019 is now generally available and announced at Microsoft Ignite 2019 on Day 1. SQL Server 2019 is an unified platform for enterprises to meet their business needs.
SQL Server 2019 in addition supports Big Data Clusters, Data Virtualization, Data Marts and Enterprise Data Lake.
More information - https://cloudblogs.microsoft.com/sqlserver/2019/11/04/sql-server-2019-is-now-generally-available/
Download SQL Server 2019 - https://www.microsoft.com/en-us/evalcenter/evaluate-sql-server-2019
What's new - https://docs.microsoft.com/en-us/sql/sql-server/what-s-new-in-sql-server-ver15?view=sql-server-ver15
Download - Introducing SQL Server 2019 e-book