SQL Server Express
| Microsoft SQL Server Express | |
|---|---|
| Developer | Microsoft |
| Stable release | Microsoft SQL Server 2025 express
/ 18 November 2025 |
| Written in | C, C++ |
| Operating system | Microsoft Windows, Linux |
| Platform | .NET Framework 4.0 |
| Available in | English, Chinese, French, German, Italian, Japanese, Korean, Portuguese (Brazil), Russian, Spanish |
| Type | Relational database management system |
| 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).