SQL Server Data Access Components (SDAC) is a library of components that provides native connectivity to SQL Server from Delphi, C++Builder, Lazarus (and Free Pascal) for both 32-bit and 64-bit Windows platforms. SDAC-based applications connect to SQL Server directly through OLE DB, which is a native SQL Server interface. SDAC is designed to help programmers develop faster and cleaner SQL Server database applications.

Native Connectivity to SQL Server
SDAC-based DB applications are easy to deploy, do not require installation of other data provider layers (such as BDE and ODBC), and that's why they can work faster than the ones based on standard Delphi data connectivity solutions. Moreover, SDAC provides working with SQL Server not only through OLE DB, but through SQL Native Client as well.

Wide Coverage of SQL Server Features
SDAC supports a wide range of SQL Server specific features, such as Transparent Application Failover, Notification, Queing and reliable messaging, SQL Server Compact Edition, User-defined Types (including HierarchyID, Geography, Geometry), Table-Valued Parameters, Filestream, and others.

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http://www.devart.com/sdac/

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