Is there some stupid newbie mistake that can cause your Derby databases to disappear?
A Derby database is just a filesystem directory, so if you accidentally remove that directory, you have just removed your database. Another common source of confusion is to use a relative filesystem name for a database in your JDBC connection URL, and then change your current working directory between runs, which causes the relative name to resolve to a different physical directory, and thus your database seems to disappear, although in fact it's still present, just in a different directory than where you're looking. Lastly, if you're using the brand-new "in-memory" database, then it automatically disappears when you shut the Derby JVM down. thanks, bryan
