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deprecated-database-engine-features-in-sql-server-2019.md

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title Deprecated Database Engine Features
titleSuffix SQL Server 2019
description Find out about deprecated Database Engine features that are still available in SQL Server 2019 (15.x), but shouldn't be used in new applications.
author MikeRayMSFT
ms.author mikeray
ms.reviewer randolphwest
ms.date 11/18/2025
ms.service sql
ms.subservice release-landing
ms.topic conceptual
ms.custom
ignite-2025
helpviewer_keywords
deprecated changes 2019 [SQL Server]
monikerRange >=sql-server-ver15 || >=sql-server-linux-ver15

Deprecated Database Engine features in SQL Server 2019 (15.x)

[!INCLUDE sqlserver2019]

[!INCLUDE sssql19-md] deprecates:

  • Data Quality Services (DQS)
  • Master Data Services (MDS)

Features that were deprecated in prior releases are also deprecated in [!INCLUDE sssql19-md]. For information about deprecated features in other versions of [!INCLUDE ssnoversion-md], see:

Deprecation guidelines

When a feature is marked deprecated, it means:

  • The feature is in maintenance mode only. No new changes are added, including changes related to addressing interoperability with new features.
  • We strive not to remove a deprecated feature from future releases to make upgrades easier. However, under rare situations, we might choose to permanently discontinue (remove) the feature from [!INCLUDE ssNoVersion] if it limits future innovations.
  • For new development work, don't use deprecated features. For existing applications, plan to modify applications that currently use these features as soon as possible.

You can monitor the use of deprecated features by using the [!INCLUDE ssNoVersion] Deprecated Features Object performance counter, or the deprecation_announcement and deprecation_final_support extended events. For more information, see Use SQL Server Objects.

Query deprecated features

The values of these counters are also available by executing the following statement:

[!INCLUDE deprecated-os-performance-counters]

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