Enter SNAC in 2005. It was a revolutionary sidecar: a single, modern, standalone DLL ( sqlncli.dll ) that bundled both OLE DB and ODBC into one package. It lived outside the Windows OS, meaning Microsoft could update it without waiting for a Windows Service Pack.
SNAC 11 (from SQL Server 2012) was the final release. No SNAC for SQL Server 2014, 2016, 2019, or 2022. ms sql native client download
They weren't killing it immediately, but they were telling the world: Stop using this for new projects. Why? Because the future was (for native code) and the new Microsoft.Data.SqlClient (.NET). Enter SNAC in 2005
Let’s unpack why this "simple driver" has such a dramatic backstory. Before SNAC, Windows had two main ways to talk to SQL Server: the old OLEDB (for desktop apps) and SQLODBC (for web apps). They worked, but they were tied to Windows’ core OS. When SQL Server 2005 introduced wild new features like XML data types , VARCHAR(MAX) , and MARS (Multiple Active Result Sets), the old drivers couldn't understand them. SNAC 11 (from SQL Server 2012) was the final release
For the uninitiated, it sounds boring. A driver. A DLL. Something that just sits there. But for database administrators and developers who lived through the SQL Server 2005 to 2012 era, SNAC is a legend—both loved and loathed.