SQL Server Data Access Components (SDAC) Features. 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.