A. Microsoft don't supply one. You can get 3rd party ones from a variety of vendors and some free open-source ones as well. It is difficult to recommend one, but WebLogic users seem to be generally happy. The full list that I know of are :-
1. WebLogic : http://weblogic.beasys.com and www.weblogic.com. (type 2, 3 or 4. SQL 6.5 and 7.0)
2. http:\\www.inetsoftware.de. JDBC Type 4 drivers for the Microsoft SQLServer 6.5 and 7.0. JDBC 1.22 driver to use with JDK 1.1x and a JDBC 2.0 driver (i-net Sprinta) to use with Java 2 (JKD 1.2x).
JDBC 1.22 : http://www.inetsoftware.de/English/produkte/jdbctreiber/Default.htm
JDBC 2.0 : http://www.inetsoftware.de/English/produkte/jdbc2/Default.htm.
3. www.openlinksw.com (www.openlinksw.co.uk)
4. http://beta.easysoft.com. JDBC/ODBC bridge (www.easysoft.com)
5. ftp://freetds.internetcds.com/pub/freetds_jdbc. Type 4 open-source driver that is designed to work with SQLServer and Sybase
7. http://lpv.home.texas.net (LpVodbc)