Microsoft SQL Server 2008 Express (64-bit) for Windows

Microsoft SQL Server 2008 Express (64-bit) is a free SQL database engine with T-SQL programmability and a subset of SQL Server components. It supports stored procedures, triggers, scalar/table functions, and views, plus indexing and transactions. Data features include XML types and queries, FILESTREAM for New Technology File System-based BLOB storage, and spatial data types. 

Also, Microsoft SQL Server 2008 Express (64-bit) packages include Express, Express with Tools, and Express with Advanced Services, which adds Reporting Services in Express mode. Development integrates with Visual Studio, ADO.NET Entity Framework, and LINQ. Distribution bundles are available from Microsoft.

Database core

Microsoft SQL Server 2008 Express (64-bit) is a Database Engine that executes T-SQL, compiles queries, and maintains ACID properties using logging. It includes programmability features: stored procedures for logic, DML triggers for event operations, and functions for reusable expressions. Views allow data projection and filtering. The Tools package adds SQL Server Management Studio Express for administration. However, Express edition enforces runtime limits and logs events when thresholds are hit.

XML data uses a native XML type with XQuery support and optional indexes for fast lookups. FILESTREAM stores BLOBs on NTFS, maintaining transactional consistency. Access is via Win32 streaming APIs or T-SQL, enabled at the instance/database level. Spatial types (geometry, geography) store vector data and provide methods for spatial analysis. All features operate within Express edition quotas and use logs for consistent backup/restore.

Express with Advanced Services adds Reporting Services Express mode for local report processing and data connections. This integrates with Microsoft Office 2007 for report consumption. Developer tools support ADO.NET Entity Framework and LINQ (Language Integrated Query) for data access that compiles to T-SQL. Microsoft provides updates via service/feature packs and includes redistributable clients, Native Client, SQLCMD, and bcp for connectivity.

Express edition value

Microsoft SQL Server 2008 Express (64-bit) delivers a T-SQL engine with stored program modules, XML, FILESTREAM, and spatial support, plus optional SSMS and SSRS Express components depending on SKU. However, it has a 10 GB per-database cap and reduced service surface typical of Express. The 2008 R2 family is out of support; SP3 is the last service pack for this line. Feature availability varies by Express package, and lifecycle status restricts servicing.

• Expanded data types and capabilities