Pablo Gutierrez has ported freetds 0.61 to QNX 4.25. FreeTDS is a free (open source) implementation of Sybase's db-lib, ct-lib, and ODBC libraries. With this library you can connect to SQL SERVER 7, SQL SERVER 2000, SYBASE databases (all of them use the TDS protocol) from a QNX 4 application.
It's been tested with MS-SQL SERVER 7.0 and MS-SQL SERVER 2000. You can download the lastest version of the port in: http://elpulpo.tripod.com/qnx