Scala DBC2 seems to be in a state of orphanage.
Scala Data base connector version 2
The DBC library comes packaged along with Scala (Look under $(scala-distribution)/src/).
There's a newer, unreleased, version called DBC2 available here. But it appears to be unmaintained.
The download available as an attachment to this page is a simple fix to the above, to get it in a working shape.
The source can be built with SBT
See the file demo/demo.scala inside the package. It shows how to create, update and query a Derby database (requires Apache Derby to be in the class path).
The original authors did all the work. I just fixed some typos and stuff.