The vendor-specific layer of JDBC that provides access to a particular database. Oracle provides three JDBC drivers--Thin, OCI, and KPRB.

A Java class that implements the JDBC driver interface and is loaded into the JDBC driver manager. The core Cloudscape product comes with a built-in, local JDBC driver.

To connect with individual databases, JDBC requires drivers for each database. The JDBC driver gives out the connection to the database and implements the protocol for transferring the query and result from client to database.