SQL Server Express

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Relational database management system

title: "SQL Server Express" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["proprietary-database-management-systems", "microsoft-server-technology", "microsoft-database-software"] description: "Relational database management system" topic_path: "technology/databases" source: "https://en.wikipedia.org/wiki/SQL_Server_Express" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Relational database management system ::

::data[format=table title="Infobox software"]

FieldValue
nameMicrosoft SQL Server Express
logoMicrosoft SQL Server 2025 icon.svg
logo size100px
developerMicrosoft
programming languageC, C++
latest release version
latest release date
operating systemMicrosoft Windows, Linux
platform.NET Framework 4.0
genreRelational database management system
languageEnglish, Chinese, French, German, Italian, Japanese, Korean, Portuguese (Brazil), Russian, Spanish
licenseProprietary software
websitewww.microsoft.com
::

| name = Microsoft SQL Server Express | logo = Microsoft SQL Server 2025 icon.svg | logo size = 100px | screenshot = | caption = | developer = Microsoft | programming language = C, C++ | latest release version = | latest release date = | operating system = Microsoft Windows, Linux | platform = .NET Framework 4.0 | genre = Relational database management system | language = English, Chinese, French, German, Italian, Japanese, Korean, Portuguese (Brazil), Russian, Spanish | license = Proprietary software | website = www.microsoft.com Microsoft SQL Server Express Edition is an edition of Microsoft's SQL Server relational database management system that is free to download, distribute and use. It comprises a database specifically targeted for embedded and smaller-scale applications. The product traces its roots to the Microsoft Database Engine (MSDE) product, which was shipped with SQL Server 2000. The "Express Edition" branding has been used since the release of SQL Server 2005.

Microsoft SQL Server Express LocalDB is a version of Microsoft SQL Server Express, on-demand managed instance of the SQL Server engine. It is targeted to developers, and has the following restrictions: up to 50 GB database size and only local connections (network connections are not supported).

Capabilities

SQL Server Express provides many of the features of the paid, full versions of Microsoft SQL Server database management system. However it has technical restrictions that make it unsuitable for some large-scale deployments. Differences in the Express product include:

  • Maximum database size of 10 GB per database in SQL Server 2019, SQL Server 2017, SQL Server 2016, SQL Server 2014, SQL Server 2012, and 2008 R2 Express (4 GB for SQL Server 2008 Express and earlier; compared to 2 GB in the former MSDE). The limit applies per database (log files excluded); but in some scenarios users can access more data through the use of multiple interconnected databases.
  • No SQL Server Agent service
  • Restricted hardware usage limits:
    • Single physical CPU, but multiple cores allowable
    • 1 GB of RAM (runs on a system with higher RAM amount, but uses only at most 1 GB per instance of SQL Server Database Engine. "Recommended: Express Editions: 1 GB All other editions: At least 4 GB and should be increased as database size increases to ensure optimal performance."). Express with Advanced Services has a limit of 4 GB per instance of Reporting Services (not available on other Express variants). Analysis Services is not available for any Express variant.

Unlike the predecessor product, MSDE, the Express product does not include a concurrent workload-governor to "limit performance if the database engine receives more work than is typical of a small number of users."

SQL Server Express includes several GUI tools for database management. These include:

  • SQL Server Management Studio since 2012 SP1; before that, only a stripped-down version called SQL Server Management Studio Express is provided
  • SQL Server Configuration Manager
  • SQL Server Surface Area Configuration tool
  • SQL Server Business Intelligence Development Studio

The predecessor product MSDE generally lacked basic GUI management tools,

Features available in SQL Server "Standard" and better editions but absent from SQL Server Express include:

LocalDB

SQL Server Express LocalDB announced at 2011.

This version supports silent installation, requires no management and is compatible with other editions of SQL Server at the API level.

LocalDB runs as non-admin user, requires no configuration or administration.

LocalDB limits to local system only and supports no remote connections. A special connection string is needed to connect this version.

It is possible create several instances of the LocalDB for different applications. Default instance names 'SqlLocalDB'.

Variants

Microsoft makes SQL Server Express N1 available as:

  • An integrated edition with management tools
  • Core database-engine only
  • A SQL Server Express with Advanced Services edition (first introduced relatively late in Q2 2006 compared to the original release) with a reduced-functionality version of SQL Server Reporting Services and with full-text search capabilities

In the Free 2005 Express version, for example, a standard approach to installation options was provided, as follows. Generally, the SQL 2005 Express installers are packaged with the following consistent naming convention:

; SQLEXPR.EXE: Has installers for BOTH 32-bit and 64-bit processors, but is a basic install ; SQLEXPR32.EXE: Has ONLY the installer for 32-bit processors (still the basic install) ; SQLEXPRWT.EXE: Has installers for BOTH 32-bit and 64-bit processors and SQL Server Management Studio Express (SSMSE) (2008 R2) ; SQLEXPR_ADV.EXE: Has the basics and SQL Server Management Studio Express (SSMSE) + Reporting and Full Text Queries ; SQLEXPR_TOOLKIT.EXE: Has the basics and SSMSE and Business Intelligence Development Studio (BIDS)

These optional variants have gone through several service packs (SP), and each SP installer can be used without using the older ones first:

  • Originals of the above files all carry the version number 9.0.1399.6
  • Service Pack 2 (SP2) versions all carry the version number 9.0.3042
  • Service Pack 3 (SP3) versions all carry the version number 9.00.4035
  • Service Pack 4 (SP4) versions all carry the version number 9.00.5000

; SqlLocalDB.msi: Microsoft® SQL Server Express LocalDB Installer. ; SQLLocalDB.exe: CLI Microsoft® SQL Server Express LocalDB (LocalDB manipulation tool).

Version history

::data[format=table title="Microsoft SQL Server Express version history"]

VersionRelease dateMainstream support end dateExtended support end dateSupported operating systems
SQL Server 2005 Express Edition2005-11-07title=Microsoft Support Lifecycle (SQL Server 2005)url=http://support.microsoft.com/lifecycle/?p1=2855access-date=26 December 2012}}
SQL Server 2008 Express2009-02-08title=Microsoft Support Lifecycle (SQL Server 2008)url=http://support.microsoft.com/lifecycle/?p1=13165access-date=26 December 2012}}
SQL Server 2008 R2 Express2010-04-16title=Microsoft Support Lifecycle (SQL Server 2008 R2)url=http://support.microsoft.com/lifecycle/?p1=14917access-date=26 December 2012}}
SQL Server 2012 Express2012-05-14title=Microsoft Support Lifecycle (SQL Server 2012)url=http://support.microsoft.com/lifecycle/?p1=16139access-date=26 December 2012}}
SQL Server 2014 Express2014-04-01title=Microsoft Support Lifecycle (SQL Server 2014)url=http://support.microsoft.com/lifecycle/?c2=1044access-date=11 April 2014}}
SQL Server 2016 Express2016-06-01title=Microsoft Support Lifecycle (SQL Server 2016)url=http://support.microsoft.com/lifecycle/?c2=1044}}2026-07-14
SQL Server 2017 Express2017-09-29title=Microsoft Support Lifecycle (SQL Server 2017)url=https://support.microsoft.com/en-us/lifecycle/search?alpha=SQL%20Server%202017}}2027-10-12
Red Hat Enterprise Linux 7.3 or 7.4, SUSE Enterprise Linux Server v12 SP2, Ubuntu 16.04LTS,
Docker Engine 1.8+ (on Windows, Mac, or Linux)
SQL Server 2019 Express2019-11-04title=Microsoft Support Lifecycle (SQL Server 2019)url=https://support.microsoft.com/lifecycle/search?alpha=SQL%20Server%202019%20on%20Windows%20(all%20editions)}}title=Microsoft Support Lifecycle (SQL Server 2019)
SQL Server 2022 Expresstitle=Microsoft Support Lifecycle (SQL Server 2022)url=https://learn.microsoft.com/en-gb/lifecycle/products/sql-server-2022}}title=Microsoft Support Lifecycle (SQL Server 2022)url=https://learn.microsoft.com/en-gb/lifecycle/products/sql-server-2022}}
SQL Server 2025 Express2025-11-182031-01-062036-01-06Windows 10 or greater, Windows Server 2019 or greater, Red Hat Enterprise Linux 9, Ubuntu 22.04LTS, Docker Engine 1.8+ (on Windows, Mac, or Linux)
::

References

References

  1. "Hardware and Software Requirements for Installing SQL Server 2014 - SQL Server | Microsoft Docs". Msdn.microsoft.com.
  2. (2017-05-24). "About the SQL Server License Terms - SQL Server | Microsoft Docs". Msdn.microsoft.com.
  3. "What is LocalDB". Express DB.
  4. (2011-11-28). "Announcing SQL Server 2012 Express LocalDB RC0". Microsoft.
  5. (July 12, 2011). "Introducing LocalDB, an improved SQL Express". Microsoft.
  6. [https://www.backup-utility.com/windows-server/windows-server-backup-reading-data-please-wait-4348.html Disable SQL Server VSS Writer service].
  7. "Features Supported by the Editions of SQL Server 2008 R2".
  8. "Compare Edition Features".
  9. "SQL Server Express with Advanced Services Features". Microsoft.
  10. (November 2008). "How SQL Server 2005 Express Edition determines the CPU count and uses the CPUs during processing". [[MSDN]].
  11. "Hardware and Software Requirements for Installing SQL Server 2014 - SQL Server | Microsoft Docs". Msdn.microsoft.com.
  12. (2017-05-24). "Editions and supported features of SQL Server 2016 - SQL Server | Microsoft Docs". Msdn.microsoft.com.
  13. (January 2004). "The SQL Server 2000 Workload Governor". [[MSDN]].
  14. (2012-11-09). "Download Microsoft® SQL Server® 2012 Service Pack 1 (SP1) Express from Official Microsoft Download Center". Microsoft.com.
  15. "How do I Manage SQL Server".
  16. (2011-07-12). "Introducing LocalDB, an improved SQL Express". Microsoft.
  17. "Download Microsoft SQL Server 2005 Express Edition from Official Microsoft Download Center".
  18. "Microsoft Support Lifecycle (SQL Server 2005)".
  19. "Microsoft SQL Server 2005 Express Edition".
  20. "Download Microsoft SQL Server 2008 Express from Official Microsoft Download Center".
  21. "Microsoft Support Lifecycle (SQL Server 2008)".
  22. (2009-02-08). "Download Microsoft® SQL Server® 2008 Express from Official Microsoft Download Center". Microsoft.com.
  23. "Download Microsoft SQL Server 2008 R2 - Express from Official Microsoft Download Center".
  24. "Microsoft Support Lifecycle (SQL Server 2008 R2)".
  25. (20 July 2015). "Hardware and Software Requirements for Installing SQL Server 2008 R2".
  26. "Download Microsoft® SQL Server® 2012 Express from Official Microsoft Download Center".
  27. "Microsoft Support Lifecycle (SQL Server 2012)".
  28. "Hardware and Software Requirements for Installing SQL Server 2012".
  29. "Microsoft® SQL Server® 2012 SP2 Express".
  30. "Download Microsoft SQL Server 2014 Express".
  31. "Microsoft Support Lifecycle (SQL Server 2014)".
  32. "Hardware and Software Requirements for Installing SQL Server 2014".
  33. "Microsoft® SQL Server® 2014 Express".
  34. "Download Microsoft SQL Server 2016 Express".
  35. "Microsoft Support Lifecycle (SQL Server 2016)".
  36. "Download Microsoft SQL Server 2017 Express".
  37. "Microsoft Support Lifecycle (SQL Server 2017)".
  38. "Download Microsoft SQL Server 2019 Express".
  39. "Microsoft Support Lifecycle (SQL Server 2019)".
  40. "Microsoft Support Lifecycle (SQL Server 2022)".
  41. "SQL Server 2025 - Microsoft Lifecycle".
  42. "SQL Server 2025: Hardware & Software Requirements - SQL Server".
  43. "Release Notes for SQL Server 2025 on Linux - SQL Server".

::callout[type=info title="Wikipedia Source"] This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page. ::

proprietary-database-management-systemsmicrosoft-server-technologymicrosoft-database-software