Import/Export reads and writes only text files. Import does not support
read-once streams (live data feeds), because it reads the first line of the
file to determine the number of columns, then reads it again to import the
data.
Note: These server-side utilities exhibit different behavior
in client/server mode. Typically, you use them to import data into and export
data from a locally running Derby. However, you can use the import/export
procedures when Derby is running in a server framework if you specify
import and export files that are accessible to the server.