hello,

when reading Oracle's manual for students I saw the following example on
composed unique identifiers:

http://tinyurl.com/jc7ra

could anybody give me a hint what a query for extracting a row from LIST
ITEM table should look like, and exemplify what its colums could be to
fullfill this EM diagram? I have a problem understanding "composed UID"
issue, I'd appreciate any explanation of it with some examples if posssible.

thanks,
geos