Sql Server–Determining version of client drivers

via: http://blogs.msdn.com/b/sqlcat/archive/2010/10/26/how-to-tell-which-version-of-sql-server-data-access-driver-is-used-by-an-application-client.aspx
T-Sql script to determine the version of SqlServer drivers being used by the client:
SELECT session_id, protocol_type,
driver_version = CASE CONVERT(CHAR(4), CAST(protocol_version AS BINARY(4)), 1)
WHEN '0x70' THEN 'SQL Server 7.0'
WHEN '0x71' THEN 'SQL Server 2000'
WHEN '0x72' THEN 'SQL Server 2005'
WHEN '0x73' THEN 'SQL Server 2008'
ELSE 'Unknown driver'
END
FROM sys.dm_exec_connections


Another useful script (this one provides you a string formated like this "SQL Server 10.0.2531.0 - SP1 (Developer Edition (64-bit))")

SELECT 'SQL Server '
    + CAST(SERVERPROPERTY('productversion') AS VARCHAR) + ' - '
    + CAST(SERVERPROPERTY('productlevel') AS VARCHAR) + ' ('
    + CAST(SERVERPROPERTY('edition') AS VARCHAR) + ')'