what kind JDBC driver do I need ?

If my java code runs on windows 2000, from there it needs to
access a Oracle or Sybase database on a Solaris Unix box,
then in the JDBC part of my java code, should I
use a Oracle or Sybase's driver for windows 2000 or for
Solaris ?

If you use a Type 4 driver (such as Oracle's THIN driver or Sybase's jconn2) then you can talk to any database regardless of what platform you are running on and what platform the database is on.
Likewise, if you are using the JDBC-ODBC bridge, then as long as you have an ODBC connection defined you can acess the database, regardless of what platform it is on.
In other words, there is only one version of these drivers--they are platform independent.

Originally posted by Wayne L Johnson:
If you use a Type 4 driver (such as Oracle's THIN driver or Sybase's jconn2) then you can talk to any database regardless of what platform you are running on and what platform the database is on.
Likewise, if you are using the JDBC-ODBC bridge, then as long as you have an ODBC connection defined you can acess the database, regardless of what platform it is on.
In other words, there is only one version of these drivers--they are platform independent.

Thanks. If I access the databse from the same Solaris box, then
certainly I should install the JDBC driver on the Solaris box;
Now, since I access it from windows OS, should I install the driver
on windows or Solaris ?

The drivers (JAR files) only need to be accessible on the machine you are running on, in this case Windows. Just make sure they're in your classpath. The files do NOT need to reside on the database servers (unless you are running a Java app on that same server).