The 29th cumulative update release for SQL Server 2019 RTM is now available for download at the Microsoft Downloads site. Please note that registration is no longer required to download Cumulative updates.
To learn more about the release or servicing model, please visit:

CU29 KB Article: https://learn.microsoft.com/troubleshoot/sql/releases/sqlserver-2019/cumulativeupdate29

Starting with SQL Server 2017, we adopted a new modern servicing model. Please refer to our blog for more details on Modern Servicing Model for SQL Server

Microsoft® SQL Server® 2019 RTM Latest Cumulative Update: https://www.microsoft.com/download/details.aspx?id=100809
Update Center for Microsoft SQL Server: https://learn.microsoft.com/en-us/troubleshoot/sql/releases/download-and-install-latest-updates

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